CN101841548A - Method for mapping host identity to network addresses - Google Patents

Method for mapping host identity to network addresses Download PDF

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CN101841548A
CN101841548A CN 201010180795 CN201010180795A CN101841548A CN 101841548 A CN101841548 A CN 101841548A CN 201010180795 CN201010180795 CN 201010180795 CN 201010180795 A CN201010180795 A CN 201010180795A CN 101841548 A CN101841548 A CN 101841548A
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host
mapping
network
host identity
mapping relations
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CN101841548B (en
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石志强
吴志美
方贵明
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Institute of Software of CAS
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Abstract

The invention discloses a method for mapping a host identity to network addresses and belongs to the field of data communication. The method comprises the steps that: (a) after receiving a host identity analysis request, a host identity analysis server inquires a mapping relation from the host identity to the network addresses; (b) if the host identity corresponds to the only network address, the analysis server sends the mapping relation comprising one mapping item; (c) if the host identity corresponds to a plurality of network addresses with different priority levels, the analysis server sorts the network addresses according to the priority level and sends the mapping relation comprising a plurality of sequential mapping items; and (d) if the host identity corresponds to a plurality of network addresses of which part of priority levels are same, after sorting according to the priority level, the analysis server sorts the network addresses with the same priority level according to a routing policy of an autonomour system border gateway protocol and an end overhead and sends the mapping relation comprising a plurality of sequential mapping items.

Description

The mapping method of host identity to network addresses
Technical field
The present invention relates to a kind of mapping method of host identity to network addresses, be specifically related to utilize bgp routing policy to realize the mapping method of the host identity to network addresses that inter-domain routing is optimized, belong to data communication field.
Background technology
The Internet adopts the packet routing function between BGP4 realization territory at present, and along with the extensive use of the Internet in the whole world, the BGP route bar number in the IPv4 network has reached more than 30 ten thousand, and the quantity in autonomous territory has also surpassed 300,000.The link-speeds of border router has reached 10Gbps in core network, and still in rapid growth.This just requires the routing inquiry time of each packet very short.On the other hand, the address space of IPv4 is about to exhaust, probably to the IPv6 network migration.Because the address of IPv6 network is that 128bit is bigger 4 times than the address of IPv4 network, make that the quantity of route may present growth at full speed in the bgp routing table of following IPv6 network, add every route length and also increased nearly 4 times, thereby surpass the limit that has three-state content addressing memory (Ternary content-addressable memory TCAM) routing capabilities now probably.Causing interconnection path is the characteristic that the IP address of current internet has host identification and two aspects, the network address concurrently by the key of a difficult problem, thereby cause the Internet show plane road by the poor efficiency characteristic, and edge network adopts many Su Fangfa to improve its reliability, makes that this problem is more outstanding.For this reason, IETF has set up sign and address separated protocol (Locator/ID Separation Protocol LISP) working group, attempts to realize separating of IP address of host sign and this double attribute of the network address.LISP draft, LISPAlternative Topology draft and LISP Map Server draft have now been formulated.But existing technology does not have to consider how to select the mapping of Internet resources expense minimum from multiple possible mapping, thereby may cause the waste of network transmission resource when realizing the host identity to network addresses mapping.Simultaneously, the delay of the mapping of existing scheme acquisition host identity to network addresses is bigger, thereby the delay that causes session to be set up is bigger.At last, it is higher that the network of prior art scheme switches cost, existing network operator lacked the excitation of disposing LISP equipment.
Summary of the invention
In view of this, the present invention is devoted to provide the mapping method of the host identity to network addresses that a kind of inter-domain routing optimizes.
The method that this method adopts host identification to separate with the network address reduces the quantity of route entry in the routing table of inter domain router, utilizes the routing iinformation of BGP, the mapping option of the host identity to network addresses of selection inter-domain routing optimum.
Fig. 3 is the schematic diagram of the environment for use of the inventive method, below in conjunction with Fig. 3 the present invention is specified.
A kind of mapping method of host identity to network addresses, this method comprises:
A) after host identity resolution server 3 is received the host identity resolution request, inquire about the mapping relations of this host identity to network addresses to mapping library, these mapping relations comprise one or more mappings items, and each mapping item comprises the network address, priority and three map unit of terminal expense;
B) as if this unique network address of host identification correspondence, then host identity resolution server 3 will comprise that the mapping relations of a mapping item send to host identification Distributor 2;
C) if the corresponding a plurality of network addresss of this host identification, and the priority of the described network address has nothing in common with each other, then host identity resolution server 3 to described network address sort, and will comprise that the mapping relations of orderly a plurality of mapping send to host identification Distributor 2 according to priority;
D) if the corresponding a plurality of network addresss of this host identification, and the precedence portion of the described network address is identical, then host identity resolution server 3 according to priority to described network address sort, identical to priority according to the routing policy of autonomous domain border gateway protocol again network address sort with terminal expense, and the mapping relations that will comprise orderly a plurality of mapping items send to host identification Distributor 2, wherein, terminal expense is used to indicate tunnel outlet router to arrive the path of user network.
In said method, after host identification Distributor 2 is received the mapping relations that host identity resolution server 3 sends, preferably preserve these mapping relations in order to follow-up use.
Further, when the tunnel portal router one is received packet but can't be resolved its destination host sign, it is transmitted to host identification Distributor 2, if host identification Distributor 2 can be resolved this host identification, then this packet is transmitted to corresponding tunnel egress router 5, and the mapping relations after will resolving send to corresponding tunnel ingress router 1; If host identification Distributor 2 can't be resolved this host identification, then send the host identity resolution request to host identity resolution server 3, after obtaining the mapping relations of this host identification, this packet is transmitted to corresponding tunnel egress router 5, and described mapping relations are sent to corresponding tunnel ingress router 1.
In said method, after corresponding tunnel portal router one is received the mapping relations of host identification Distributor 2 transmissions, preferably preserve these mapping relations in order to follow-up use.
Further, described mapping relations comprise an expired moment attribute, when the tunnel portal router one is found this expired moment then, and the mapping relations that please look for novelty to host identification Distributor 2; Find this expired moment then when host identification Distributor 2, send the host identity resolution request to host identity resolution server 3.
In the methods of the invention, host identification owner or its agency are responsible for registering or upgrading to authoritative organization the mapping relations of its host identity to network addresses.The mapping relations of host identity to network addresses are responsible for issue by authoritative organization and are upgraded, and successively are delivered to each autonomous territory along ISP (ISP), as shown in Figure 1.That is to say that in said method, the mapping relations in the described mapping library are from the mapping relations of selected the Internet group hair-weaving cloth.
Further, domain name resolution server 4 in the autonomous territory is received the domain name mapping request and is finished host domain name after the parsing of host identification, send the host identity resolution request to host identity resolution server 3, the orderly mapping relations that parsing obtains pass to host identification Distributor 2, so just set up mapping relations, improved the packet forwarding speed of host identification Distributor 2 prior to the packet that will arrive future.
In said method, when the tunnel portal router one detects first mapping corresponding network address in the described mapping relations and can't use, if there are other mapping items in described mapping relations, then shine upon the network address that selective sequential can be used the item from described other.
In the methods of the invention, the mapping relations of the host identity to network addresses that tunnel portal router, host identification Distributor and main frame mark resolution server are stored and resolved can be the mapping relations of sign subnet to the network address, and be not only the mapping relations of a host identity to network addresses, the size of this subnet is by the mask decision of this subnet.
Described mapping relations also can be double-layer structures that comprises two-layer sign subnet, and the sign subnet of ground floor is a graduation to the host identification space, are to mutually disjoint each other between the sign subnet of ground floor promptly; Can comprise a plurality of second layers sign subnets under the sign subnet of ground floor, and the common factor between second layer sign subnet can non-NULL, promptly intersects each other between part second layer sign subnet.
Compare with prior art, the present invention has following technical advantage:
1, the mapping method of the host identity to network addresses of the present invention's proposition can utilize the network link resource efficiently.Owing to comprised in the bgp routing information and arrived the autonomous territory quantity that to pass through a network address, therefore the present invention is in a plurality of optional network addresss, the network address of autonomous territory that selection is passed through and terminal expense sum minimum just can reduce the use amount of network link resource as tunnel outlet router.
2, the mapping method of the host identity to network addresses of the present invention's proposition has map locating speed faster.Because great majority communication all needs to use the domain name mapping service to obtain host identification, so just can prepare the required host identification mapping relations of subsequent data bag in advance, thereby reduce the time of delay that session is set up.
3, the mapping method of the host identity to network addresses of the present invention's proposition makes the tunnel portal router have faster package speed.The package speed of tunnel portal router depends on the quantity of mapping item in its host identification mapping table, and the quantity of mapping item is few more, and inquiry velocity is fast more, thereby package speed is also fast more.Among the present invention, the tunnel portal router is only preserved the current mapping item that is using, so have package speed faster.
4, the mapping method of the host identity to network addresses of the present invention's proposition can avoid the tunnel portal router to make encapsulation selection improperly.Mapping table is looked into choosing and is still adopted the longest host identification prefix matching principle at present, existing method following encapsulation improperly may occur and select: only have at the tunnel portal router under the situation of part host identification mapping item, may mate and select short host identification prefix, and the longer host identification that another more mates is not owing to be used in the buffer memory mapping table of this tunnel portal router.The present invention is divided into mapping table two-layer, and the host identification prefix of ground floor is mutually disjoint each other, has therefore just avoided the appearance of this situation.
5, the mapping method of the host identity to network addresses that proposes of the present invention is responsible for the discovery and the recovery of network failure by the tunnel portal router, thereby the time of fault restoration is shorter, the function of mapping resolution server obtain simplifying and load lower.
6, the host identification map information that provides of the mapping method of the host identity to network addresses that proposes of the present invention is more credible.The host identification map information is responsible for registration by the host identification owner, is responsible for issue by authoritative organization, and successively passes to terminal network, can effectively defend malicious attack and faulty operation.
7, the mapping method of the host identity to network addresses of the present invention's proposition has stronger network migration to drive to Virtual network operator.Adopt 6to4 automatic tunnel technology, realize connecting isolated IPv6 site by the IPv4 network; Can progressively adopt the host identification mapping techniques at the tunnel portal router, have the network that separates with the address to sign preferably and seamlessly transit effect, can finish again from of the migration of IPv4 network to the IPv6 network.
Description of drawings
Fig. 1 is the process of the setting up schematic diagram of host identity to network addresses mapping library among the present invention;
Fig. 2 is the distribution procedure schematic diagram of host identity to network addresses mapping library of the present invention;
Fig. 3 is the resolving schematic diagram of host identity to network addresses mapping relations of the present invention;
Fig. 4 is a host identity to network addresses mapping relations structural representation of the present invention;
Fig. 5 is the host identity to network addresses mapping relations structural representation of routing optimality of the present invention;
Fig. 6 is the migration scheme schematic diagram of IPv4 network of the present invention to the IPv6 network.
Fig. 7 for of the present invention be the host identification mapping network structural representation of the simple scenario of core with the IPv4 network.
Fig. 8 for of the present invention be the host identification mapping network structural representation of the complex situations of core with the IPv4 network.
Embodiment
In conjunction with the accompanying drawings the present invention is done more specifically to describe below by specific embodiment.
Present embodiment is based on IPv4 and IPv6 network environment, realizes the mapping service of host identity to network addresses.
One .IPv4 network is to the migration of IPv6 network
6to4 is the mode in a kind of automatic structure tunnel, and its benefit only need to be only IPv4 address, a whole world just can make whole website obtain the connection of IPv6.The end in IPv4 tunnel can extract from the address prefix in IPv6 territory automatically, because the IPv4 address packet of website is contained in the IPv6 address prefix.The TLA value of the terminal IPv6 network in 6to4 tunnel is 2002: :/16; 17 to 48 of the terminal IPv6 network in 6to4 tunnel is the IPv4 address of tunnel end; The 6to4 tunnel need use the IPv4 agreement of 41 types that the IPv6 packets of information is packaged in the IPv4 packets of information.
This migration scheme as shown in Figure 6, GA, GB and GC are the support IPv4 of 6to4 tunnel end and the dual-stacker router of IPv6, NA, NB and NC are the terminal networks of three IPv6 that are connected under these three dual-stacker routers.The terminal network of these three IPv6 can mutual communication by the IPv4 network.If NA has an IPv6 packet P to send to NC, packet P can arrive router GA earlier, and GA finds that preceding 16 of packet P is 2002, and just according to the 17th to 48 address prefix information, the packet header with IPv6 packet P encapsulates a last IPv4 is transmitted to GC; After GC peels off the packet header of IPv4, again packet P is transmitted to the NC network; Reverse communication process also is identical.
Only there is the website of 6to4 connectedness also can communicate by letter with pure IPv6 website.In Fig. 6, IPv6 network N A is exactly the website that the 6to4 connectedness is only arranged, and IPv6 network N D and NE are exactly pure IPv6 website.Router GA is configured to its 6to4 relay router to router GC.If NA has an IPv6 packet P to send to NE, packet P can arrive router GA earlier, and GA finds that preceding 16 of packet P is 2001, and the packet header with IPv6 packet P encapsulates a last IPv4 is transmitted to its 6to4 and relays router GC; After GC peels off the packet header of IPv4, again packet P is transmitted to network N D; Network N D is transmitted to network N E to packet again.It is GC that network N E and ND also dispose its 6to4 relay router.Network N E is when network N A return data bag Q, and packet Q is routed to network N D earlier, is routed to router GC again, and GC is 2002 according to its IPv6 address prefix, just automatically with packet Q encapsulation IPv4 packet header, is forwarded to router GA; After router GC peels off IPv4 packet header, packet Q is forwarded to network N A.
In network configuration shown in Figure 6, network N A, NB and NC can also be accomplished to the network service of IPv4 server router GA, GB and GC as the network address translation router (Network Address Translation) of its IPv4.
Two. with the IPv4 network is the host identification mapping network of core
Fig. 7 is to be the host identification mapping network structure chart of the simple scenario of core with the IPv4 network, and promptly the host identification prefix and the network address are mapping relations one by one.Identical with Fig. 6, can communicate with each other between the website of 6to4 connectedness; Only there are the website of 6to4 connectedness and the pure IPv6 website also can intercommunication; Support that particularly no longer needing to relay router by 6to4 between the 6to4 website of host identification mapping and the pure IPv6 website comes relaying, can set up direct-connected tunnel between them.In Fig. 7, circular router GA and GE are the tunnel portal routers with host identification mapping function, also are the tunnel outlet router with host identification mapping function.If network N A has packet P to send to network N E, packet can at first arrive router GA, because router GA can inquire about the map record that obtains host identification network N E, router GA just can come encapsulated data packet P with destination address 159.226.1.126 so, after the pending data bag arrives router GE, peel off IPv4 packet header, again packet P is forwarded to network N E.Network N E turns back to the packet Q of network G A, arrive router GE after because its address prefix is 2002, send to the GA router after can adopting automatic tunnel packet Q encapsulation, be forwarded to network N A at last.
Fig. 8 is to be the host identification mapping network structure chart of the complex situations of core with the IPv4 network, and promptly a host identification prefix can be mapped as a plurality of network addresss.In Fig. 8, NA and NC are two bigger IPv6 user networks, separately by two BGP link and Internet connections based on IPv4.GIA, GIB, GIC and GID are the tunnel portal routers, are positioned at the inlet of no default routed domain (Default-free zone DFZ); GOA, GOB, GOC and GOD are tunnel outlet router, are positioned at the user side on BGP border.Equipment GIA, GIB, GOA, GOB, RA and RB constitute an IPv4/IPv6 dual stack network; Equipment GIC, GID, GOC, GOD, RC and RD constitute another IPv4/IPv6 dual stack network.
If for network N A, be GOC to the first-selected tunnel outlet router of network N C; For network N C, be GOA to the first-selected tunnel outlet router of network N A; The communication process of network N A and network N C is as follows.When main frame HA sent packet P to main frame HC, packet P arrived tunnel portal router GIA by default route, and GIA is in the packet header of an IPv4 of packet P outer package, and its purpose IPv4 address is 159.226.3.126, and IPv4 address, source is 10.1.0.3; After packet arrived tunnel outlet router GOA, changing IPv4 address, its source was 159.226.1.126, and sends to tunnel outlet router GOC; Tunnel outlet router GOC peels off the IPv4 packet header of this packet, and the IPv6 packet P of inside is routed to main frame HC.The communication process of the packet Q that main frame HC returns is also roughly the same, and packet Q arrives tunnel portal router GIC by default route earlier; GIC is in the packet header of an IPv4 of packet Q outer package, and its purpose IPv4 address is 159.226.1.126, and IPv4 address, source is 10.0.0.3; After packet arrived tunnel outlet router GOC, changing IPv4 address, its source was 159.226.3.126, and sends to tunnel outlet router GOA; Tunnel outlet router GOA peels off the IPv4 packet header of this packet, and the IPv6 packet Q of inside is routed to main frame HA.
Three. the foundation in host identity to network addresses mapping relations storehouse
As shown in Figure 1, the mapping relations of its all host identity to network addresses are responsible for registering to ICANN in each autonomous territory by its exit tunnel router.For the host identification owner who self does not have the exit tunnel router,, register the mapping relations of its all host identity to network addresses to ICANN by the supplier agency that Internet access service is provided for it.Its registration message form as shown in Figure 4.With Fig. 8 is example, and the ground floor host identification prefix of IPv6 network N A is 2001:0CC0:2048: :/48, and second layer host identification quantity is 1; Second layer host identification prefix or 2001:0CC0:2048: :/48, second layer host identification mapping amount is 2; First network address is 159.226.1.126, and priority is 1, and terminal expense is 1; Second network address is 159.226.2.126, and priority is 2, and terminal expense is 1.Log-on message encoded content such as following table 1.
Table 1
??2001:0CC0:2048:: ??48 ??1
??2001:0CC0:2048:: ??48 ??2
??159.226.1.126 ??1 ??1
??159.226.2.126 ??2 ??1
With Fig. 8 is example, and the ground floor host identification prefix of IPv6 network N C is 2001:0CC0:2049: :/48, and second layer host identification quantity is 2.First second layer host identification prefix or 2001:0CC0:2049: :/48, first second layer host identification mapping amount is 2, and first network address is 159.226.4.126 under it, and priority is 1, and terminal expense is 1; Its following second network address is 159.226.3.126, and priority is 2, and terminal expense is 1.Second second layer host identification prefix is 2001:0CC0:2049: :/60, second second layer host identification mapping amount is 2, and first network address is 159.226.4.126 under it, and priority is 1, and terminal expense is 10; Its following second network address is 159.226.3.126, and priority is 1, and terminal expense is 1.Log-on message encoded content such as following table 2.
Table 2
??2001:0CC0:2049:: ??48 ??2
??2001:0CC0:2048:: ??48 ??2
??159.226.4.126 ??1 ??1
??159.226.3.126 ??2 ??1
??2001:0CC0:2048:: ??60 ??2
??159.226.4.126 ??1 ??10
??159.226.3.126 ??1 ??1
Four. the distribution in host identity to network addresses mapping relations storehouse
As shown in Figure 2, establishment is responsible for by ICANN in host identity to network addresses mapping relations storehouse, and successively from Tier 1 operator to Tier 2 operators, arrive terminal network at last.
Five. the resolving of host identity to network addresses mapping relations
As shown in Figure 3, when the tunnel portal router is received the packet that can not resolve the destination host sign, be transmitted to the host identification Distributor.If the host identification Distributor can not be resolved this destination host sign, resolve this destination host sign with regard to this packet of buffer memory and requesting host identification (RNC-ID) analytic server; After obtaining resolution response, just transmit this resolution response, and encapsulate, transmit this packet to corresponding tunnel outlet router to corresponding tunnel portal router.If the host identification Distributor can be resolved this destination host sign, send resolution response to the tunnel portal router, and encapsulate, transmit this packet to corresponding tunnel outlet router.The host identity resolution server is according to host identity to network addresses mapping library and bgp routing information, draws the sequence of mapping of host identity to network addresses.
As shown in Figure 3, during domain name mapping request in domain name resolution server is received the territory, just trigger the host identity resolution server and go to resolve corresponding host identification, and map information is stored in the host identification Distributor.
In conjunction with Fig. 8, when main frame HA when HC sends message first, main frame HA at first arrives the mapping of host identification by the domain name of the domain name resolution server requesting host HA in the network N A, this has just triggered the analysis request of domain name resolution server to the host identification 2001:0CC0:2049::5 of host identity resolution server transmission HC.For the host identity to network addresses mapping relations shown in the table 2, for first second layer network address prefix, the priority of network address 159.226.4.126 is 1, than the priority height of network address 159.226.3.126, so network address 159.226.4.126 is positioned at this sequence head and the tail.For second second layer network address prefix, network address 159.226.4.126 is identical with the priority of network address 159.226.4.126, if the IPv4 network link attribute in the table 2 is identical to all tunnel outlet router, the path sum of the terminal expense of network address 159.226.3.126 correspondence and BGP is less than corresponding terminal expense of network address 159.226.4.126 and the path sum of BGP, so network address 159.226.3.126 is positioned at this sequence head and the tail so.Just can draw the sequence relation of host identity to network addresses as shown in table 3 according to above analysis.
Table 3
??2001:0CC0:2049:: ??48 ??2
??2001:0CC0:2049:: ??48 ??2
??159.226.4.126 ??159.226.3.126
??2001:0CC0:2049:: ??60 ??2
??159.226.3.126 ??159.226.4.126

Claims (10)

1. the mapping method of a host identity to network addresses, this method comprises:
A) after host identity resolution server (3) is received the host identity resolution request, inquire about the mapping relations of this host identity to network addresses to mapping library, these mapping relations comprise one or more mappings items, and each mapping item comprises the network address, priority and three map unit of terminal expense;
B) as if this unique network address of host identification correspondence, then host identity resolution server (3) will comprise that the mapping relations of a mapping item send to host identification Distributor (2);
C) if the corresponding a plurality of network addresss of this host identification, and the priority of the described network address has nothing in common with each other, then host identity resolution server (3) to described network address sort, and will comprise that the mapping relations of orderly a plurality of mapping send to host identification Distributor (2) according to priority;
D) if the corresponding a plurality of network addresss of this host identification, and the precedence portion of the described network address is identical, then host identity resolution server (3) according to priority to described network address sort, identical to priority according to the routing policy of autonomous domain border gateway protocol again network address sort with terminal expense, and the mapping relations that will comprise orderly a plurality of mapping items send to host identification Distributor (2), wherein, terminal expense is used to indicate tunnel outlet router to arrive the path of user network.
2. the mapping method of host identity to network addresses as claimed in claim 1 is characterized in that, host identification Distributor (2) is preserved this mapping relations after receiving the mapping relations of host identity resolution server (3) transmission.
3. the mapping method of host identity to network addresses as claimed in claim 1 or 2, it is characterized in that: when tunnel portal router (1) is received packet but can't be resolved its destination host sign, it is transmitted to host identification Distributor (2), if host identification Distributor (2) can be resolved this host identification, then this packet is transmitted to corresponding tunnel egress router (5), and the mapping relations after will resolving send to corresponding tunnel ingress router (1); If host identification Distributor (2) can't be resolved this host identification, then send the host identity resolution request to host identity resolution server (3), after obtaining the mapping relations of this host identification, this packet is transmitted to corresponding tunnel egress router (5), and described mapping relations are sent to corresponding tunnel ingress router (1).
4. the mapping method of host identity to network addresses as claimed in claim 3 is characterized in that, corresponding tunnel portal router (1) is preserved this mapping relations after receiving the mapping relations of host identification Distributor (2) transmission.
5. the mapping method of host identity to network addresses as claimed in claim 4, it is characterized in that, described mapping relations comprise an expired moment, when tunnel portal router (1) is found this expired moment then, and the mapping relations that please look for novelty to host identification Distributor (2); Find this expired moment then when host identification Distributor (2), send the host identity resolution request to host identity resolution server (3).
6. the mapping method of host identity to network addresses as claimed in claim 1, it is characterized in that, domain name resolution server (4) in the autonomous territory is received the domain name mapping request and is finished host domain name after the parsing of host identification, sends the host identity resolution request to host identity resolution server (3).
7. the mapping method of host identity to network addresses as claimed in claim 1 is characterized in that, the mapping relations in the described mapping library are from the mapping relations of selected the Internet group hair-weaving cloth.
8. the mapping method of host identity to network addresses as claimed in claim 3, it is characterized in that, tunnel portal router (1) detects first mapping corresponding network address in the described mapping relations can't use the time, if there are other mapping items in described mapping relations, then shine upon the network address that selective sequential can be used the item from described other.
9. the mapping method of host identity to network addresses as claimed in claim 1 is characterized in that, described mapping relations are sign subnet mapping relations to the network address, and the size of this subnet is by the mask decision of this subnet.
10. the mapping method of host identity to network addresses as claimed in claim 1 is characterized in that, described mapping relations comprise two-layer sign subnet, and ground floor sign subnet is the graduation to the host identification space, mutually disjoints each other between ground floor sign subnet; Comprise a plurality of second layer sign subnets under the ground floor sign subnet, intersect each other between part second layer sign subnet.
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CN108141384B (en) * 2015-11-04 2021-05-28 思科技术公司 Automatic provisioning of LISP mobility networks
CN105681488A (en) * 2016-01-28 2016-06-15 安徽四创电子股份有限公司 Service network address acquisition method based on fleet cluster service distribution
CN105681488B (en) * 2016-01-28 2019-07-23 安徽四创电子股份有限公司 A kind of service network address acquiring method based on the distribution of fleet cluster service
CN109729183A (en) * 2018-05-16 2019-05-07 平安科技(深圳)有限公司 Request processing method, device, equipment and storage medium
CN109729183B (en) * 2018-05-16 2021-10-26 平安科技(深圳)有限公司 Request processing method, device, equipment and storage medium

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