CN103580845B - A kind of clock synchronizing method based on virtual switch cluster and device - Google Patents
A kind of clock synchronizing method based on virtual switch cluster and device Download PDFInfo
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- CN103580845B CN103580845B CN201210250325.6A CN201210250325A CN103580845B CN 103580845 B CN103580845 B CN 103580845B CN 201210250325 A CN201210250325 A CN 201210250325A CN 103580845 B CN103580845 B CN 103580845B
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Abstract
The invention discloses a kind of clock synchronizing method based on virtual switch cluster, including: virtual switch cluster includes a primary physical equipment and at least one is from physical equipment, primary physical equipment sends sync message by each stacking opening, receive from primary physical equipment from physical equipment or other are from the sync message of physical equipment, determine the synchronization stacking opening of self；Described carry out clock synchronization from physical equipment according to the sync message received from described synchronization stacking opening, and generate new sync message, and described new sync message is sent by asynchronous stacking opening, wherein, described sync message includes: MAC header, EtherType, type of message, sync id (flag), device identification (shelf) and line delay (Delay).The present invention also accordingly discloses a kind of clock synchronization apparatus based on virtual switch cluster.By the technical scheme described in the embodiment of the present invention, it is achieved that in VSC, the clock of physical equipment synchronizes such that it is able to improve systematic function.
Description
Technical field
The present invention relates to data communication field, particularly relate to a kind of based on virtual switch cluster (Virtual Switch
Cluster, VSC) clock synchronizing method and device.
Background technology
At present, IEEE1588 carry out clock synchronize have been widely used for data communication field, VSC conduct
Node important in transmission network, supports that the synchronizing characteristicss such as 1588 are the most necessary, and this needs VSC in a network
Play the part of the key players such as transmission clock (TC), boundary clock (BC), ordinary clock (OC), so needing
The mechanism wanting complete set ensures to realize between each physical equipment in VSC clock frequency and clock phase
Synchronize.
But, realize VSC at present generally by stacking opening by data message system in control message and band
Forwarding in system, does not has unnecessary hardware interface frequency and phase information to be passed between physical equipment
Other physical equipments, cause the clock of each physical equipment to synchronize, thus affect systematic function.
Summary of the invention
In view of this, present invention is primarily targeted at a kind of clock synchronizing method based on VSC of offer and dress
Put, it is possible to the clock realizing physical equipment in VSC synchronizes, and improves systematic function.
For reaching above-mentioned purpose, the technical scheme is that and be achieved in that:
A kind of clock synchronizing method based on virtual switch cluster, described virtual switch cluster includes a principal goods
Reason equipment sends sync message, the party from physical equipment, primary physical equipment by each stacking opening with at least one
Method includes:
Receive from primary physical equipment from physical equipment or other are from the sync message of physical equipment, determine self
Synchronization stacking opening；
Described carry out clock synchronization from physical equipment according to the sync message received from described synchronization stacking opening, with
And generate new sync message, and described new sync message is sent by asynchronous stacking opening,
Wherein, described sync message includes: MAC header, EtherType, type of message, sync id flag,
Device identification shelf and line delay Delay.
Described determine self from physical equipment synchronization stacking opening be:
Described only receive a sync message from physical equipment, it is determined that receive the stacking opening of described sync message
Synchronization stacking opening for self；
Described receive one or more sync message from physical equipment, then according to each sync message, determine
The stacking opening that the minimum sync message of the value of flag+shelf is corresponding is the synchronization stacking opening of self.
Described sync message also includes that original time stabs origin Timestamp.
Described after physical equipment receives sync message, the method also includes:
Described from physical equipment receive follow message, described in follow message carry original time stamp origin
Timestamp。
Described from physical equipment according to the sync message received from described synchronization stacking opening carry out clock synchronize be:
Described from physical equipment by described synchronization stacking opening, use and synchronize ether mode and obtain synchronised clock frequency
Rate；And calculate phase contrast offset=originTimestamp-Delay-T, wherein, T is described from physics
Equipment receives the timestamp of described sync message, afterwards, plus described calculating in present clock phase basis
Phase contrast, as synchronize after clock phase.
Described from physical equipment generate new sync message be:
Sync message based on described reception, is revised as the device identification of self, by flag+1 by shelf value
Value as new flag value and the link delay that the value of Delay is revised as self.
Described from physical equipment generate new sync message be:
Sync message based on described reception, is revised as the device identification of self, by flag+1 by shelf value
Value as new flag value, the value of Delay is revised as the link delay of self and by origin
Timestamp is revised as sending the timestamp of described sync message.
A kind of clock synchronization apparatus based on virtual switch cluster, including: a primary physical equipment and at least one
From physical equipment；Wherein,
Described primary physical equipment, for sending sync message by each stacking opening；
Described from physical equipment, for reception, from primary physical equipment or other are from the sync message of physical equipment,
Determine the synchronization stacking opening of self；Sync message according to receiving from described synchronization stacking opening carries out clock synchronization,
And generate new sync message, and described new sync message is sent by asynchronous stacking opening,
Wherein, described sync message includes: MAC header, EtherType, type of message, sync id flag,
Device identification shelf and line delay Delay.
Described from physical equipment, specifically for when only receiving a sync message, determine the described synchronization of reception
The stacking opening of message is the synchronization stacking opening of self；When receiving one or more sync message, according to each synchronization
Message, determines that the stacking opening that the minimum sync message of the value of flag+shelf is corresponding is the synchronization stacking opening of self.
Described sync message also includes that original time stabs origin Timestamp.
Described from physical equipment, be additionally operable to follow message receiving to receive after sync message, described in follow and disappear
Breath carries original time stamp origin Timestamp.
Described from physical equipment, specifically for by described synchronization stacking opening, use synchronization ether mode to obtain
Synchronised clock frequency；And calculate phase contrast offset=originTimestamp-Delay-T, wherein, T is
The described timestamp receiving described sync message from physical equipment, afterwards, adds in present clock phase basis
The phase contrast of upper described calculating, as the clock phase after synchronizing.
Described from physical equipment, specifically for sync message based on described reception, shelf value is revised as certainly
The device identification of body, the value of Delay as new flag value and is revised as self by the value of flag+1
Link delay.
Described from physical equipment, specifically for sync message based on described reception, shelf value is revised as certainly
The device identification of body, using the value of flag+1 as new flag value, the chain that the value of Delay is revised as self
Road postpones and origin Timestamp is revised as sending the timestamp of described sync message.
Clock synchronizing method based on VSC and device described in the embodiment of the present invention, virtual switch cluster includes one
Individual primary physical equipment sends sync message from physical equipment, primary physical equipment by each stacking opening with at least one,
Receive from primary physical equipment from physical equipment or other are from the sync message of physical equipment, determine the same of self
Step stacking opening；Described from physical equipment according to the sync message received from described synchronization stacking opening carry out clock with
Step, and generate new sync message, and described new sync message is sent by asynchronous stacking opening,
Wherein, described sync message includes: MAC header, EtherType, type of message, sync id (flag),
Device identification (shelf) and line delay (Delay).By the technical scheme described in the embodiment of the present invention,
The clock achieving physical equipment in VSC synchronizes such that it is able to improve systematic function.
Accompanying drawing explanation
Fig. 1 is a kind of clock synchronizing method schematic flow sheet based on virtual switch cluster of the embodiment of the present invention；
Fig. 2 is the VSC clock synchronization principles schematic diagram of the embodiment of the present invention.
Detailed description of the invention
The basic thought of the present invention is: virtual switch cluster includes a primary physical equipment and at least one is from thing
Reason equipment, primary physical equipment sends sync message by each stacking opening, receives from primary physical from physical equipment
Equipment or other are from the sync message of physical equipment, determines the synchronization stacking opening of self；Described from physical equipment
Sync message according to receiving from described synchronization stacking opening carries out clock synchronization, and generates new sync message,
And described new sync message is sent by asynchronous stacking opening, wherein, described sync message includes: MAC
Head, EtherType, type of message, sync id (flag), device identification (shelf) and line delay (Delay).
In the present invention, virtual switch cluster includes a primary physical equipment and at least one is from physical equipment, main
Physical equipment sends sync message by each stacking opening, and described sync message generally comprises: MAC header (MAC
Header), EtherType (Ether type), type of message (Msg type), sync id (flag), set
Standby mark (shelf) and line delay (Delay).
Optionally, described sync message also includes that original time stabs origin Timestamp, synchronizes report accordingly
Literary composition structure is as shown in table 1:
| Octets | Offset | |
| MAC header | 12 | 0 |
| Ether type | 2 | 12 |
| Msg type | 2 | 12 |
| originTimestamp | 10 | 16 |
| Flag | 2 | 26 |
| Shelf | 2 | 28 |
| Delay | 4 | 30 |
Table 1
In table 1, this physical equipment is all filled in for MAC header, purpose MAC and source MAC
MAC；Ether type is typically fixed as 0x0808；Msg type indicates this message to be sync message；For
OriginTimestamp, general high 48bit is the second, and low 32bit is nanosecond；For Flag, primary physical equipment
Can be 0, often increase by 1 through one-level physical equipment flag；Shelf may indicate that the thing sending sync message
The shelf id of reason equipment；The line delay of Delay instruction stacking opening, the light line length being connected with stacking opening port
Spending relevant, determine according to being pre-configured with, unit is nanosecond.
Optionally, described after physical equipment receives sync message, the method also includes: described from physics
Equipment receive follow message, described in follow message carry original time stamp origin Timestamp.
Such as, primary physical equipment by stacking opening to other direct-connected physical equipments send sync message time, permissible
The timestamp of transmission is beaten inside sync message by hardware, or the timestamp reading transmission is put into and follows
(follow_up) (the Msg type in follow_up message indicates this message for following message) inside message,
And the flag in message is arranged to 0xff, fill in oneself shelf id in sync message, simultaneously by correspondence
The link delay (delay) that stacking opening connects is filled up in sync message,.
It should be noted that primary physical equipment can be determined in the following manner and from physical equipment:
(1) when VSC as BC equipment when, which physics is the current sync stacking opening of 1588 be arranged on
Equipment, what which physical equipment was corresponding is exactly primary physical equipment.Remaining physical equipment is all from physical equipment；
(2) when VSC as TC equipment when, synchronize ether current sync stacking opening be arranged on which thing
Reason equipment, what which physical equipment was corresponding is exactly primary physical equipment.Remaining physical equipment is all to set from physics
Standby.
(3) when VSC as TC equipment when, do not enable synchronization ether, on the control card of VSC
By the situation that the configuring condition of shelf and physical equipment are in place, determine primary physical equipment, such as, according to shelf
Value competition, determine that physical equipment minimum and in place for shelf id is primary physical equipment, do not compete into principal goods
The physical equipment of reason equipment is all from physical equipment, and the result of decision can be handed down to each physical equipment afterwards.
Fig. 1 is a kind of clock synchronizing method schematic flow sheet based on virtual switch cluster of the embodiment of the present invention,
As it is shown in figure 1, the method includes:
Step 101: receive from primary physical equipment from physical equipment or other are from the sync message of physical equipment,
Determine the synchronization stacking opening of self；
Optionally, described determine self from physical equipment synchronization stacking opening be: described only connect from physical equipment
Receive a sync message, it is determined that the stacking opening receiving described sync message is the synchronization stacking opening of self；Institute
State and receive one or more sync message from physical equipment, then according to each sync message, determine the value of flag+shelf
The stacking opening that minimum sync message is corresponding is the synchronization stacking opening of self.
Step 102: described when physical equipment is carried out according to the sync message received from described synchronization stacking opening
Clock synchronizes, and generates new sync message, and is sent out by asynchronous stacking opening by described new sync message
Send.
Optionally, described clock is carried out from physical equipment according to the sync message received from described synchronization stacking opening
Synchronization is: described from physical equipment by described synchronization stacking opening, use and synchronize ether mode when obtaining synchronization
Clock frequency rate；And calculate phase contrast offset=originTimestamp-Delay-T, wherein, T be described from
Physical equipment receives the timestamp of described sync message, afterwards, plus described in present clock phase basis
The phase contrast calculated, as the clock phase after synchronizing.
Optionally, sync message is not included original time stamp origin Timestamp scene, described from
Physical equipment generates new sync message: sync message based on described reception, shelf value is revised as certainly
The device identification of body, the value of Delay as new flag value and is revised as self by the value of flag+1
Link delay.
Optionally, sync message is also included original time stamp origin Timestamp scene, described from
Physical equipment generates new sync message: sync message based on described reception, shelf value is revised as certainly
The device identification of body, using the value of flag+1 as new flag value, the chain that the value of Delay is revised as self
Road postpones and origin Timestamp is revised as sending the timestamp of described sync message.
Concrete, after physical equipment receives the sync message that primary physical equipment sends over, determine oneself
Synchronization stacking opening, by synchronize ether recover frequency.In physical layer or MAC layer, receive synchronization report
Carry out during literary composition beating stamp T；Afterwards, software module is given, by software by sync message and the time stamp T of reception
Module calculates phase contrast offset=originTimestamp-Delay-T, and row clock phase place of going forward side by side adjusts.Meanwhile,
The stacking opening thought by synchronizing stacking opening sends new sync message, specifically passes through hard by the timestamp sent
Part is beaten inside described new sync message, or the timestamp reading transmission is put in follow_up message
Face, Shelf fills in oneself Shelf id, Flag and adds 1 on the basis of the message of the slave stacking opening received,
The link delay delay that correspondence sends stacking opening connection simultaneously is filled up in described new sync message.Its
He be not directly connected with primary physical equipment from physical equipment, multiple synchronization from physical equipment may be received
Message, compares, and is this physics to receive that stacking opening that in sync message, flag+shelf value is minimum
The synchronization stacking opening of equipment, subsequent treatment is directly connected to the identical from physical equipment of primary physical equipment with above-mentioned.
Can be whether 0 to judge by the flag in message it should be noted that the most direct-connected with primary physical equipment.
As a example by using 1588 agreements, the VSC clock synchronization principles that the present embodiments relate to is as shown in Figure 2.
The embodiment of the present invention also accordingly discloses a kind of clock synchronization apparatus based on virtual switch cluster, should
Device includes: a primary physical equipment and at least one from physical equipment；Wherein,
Described primary physical equipment, for sending sync message by each stacking opening；
Described from physical equipment, for reception, from primary physical equipment or other are from the sync message of physical equipment,
Determine the synchronization stacking opening of self；Sync message according to receiving from described synchronization stacking opening carries out clock synchronization,
And generate new sync message, and described new sync message is sent by asynchronous stacking opening,
Wherein, described sync message includes: MAC header, EtherType, type of message, sync id flag,
Device identification shelf and line delay Delay.
Optionally, described from physical equipment, specifically for when only receiving a sync message, determining reception
The stacking opening of described sync message is the synchronization stacking opening of self；When receiving one or more sync message, root
According to each sync message, determine that the stacking opening that the minimum sync message of the value of flag+shelf is corresponding is the synchronization of self
Stacking opening.
Optionally, described sync message also includes that original time stabs origin Timestamp.
Optionally, described from physical equipment, it is additionally operable to after receiving sync message receive follow message, institute
State follow message carry original time stamp origin Timestamp.
Optionally, described from physical equipment, specifically for by described synchronization stacking opening, use and synchronize ether
Mode obtains synchronised clock frequency；And calculate phase contrast offset=originTimestamp-Delay-T, its
In, T is the described timestamp receiving described sync message from physical equipment, afterwards, in present clock phase place
On the basis of plus the phase contrast of described calculating, as the clock phase after synchronizing.
Optionally, described from physical equipment, specifically for sync message based on described reception, by shelf
Value is revised as the device identification of self, using the value of flag+1 as new flag value and by the value of Delay
It is revised as the link delay of self.
Optionally, described from physical equipment, specifically for sync message based on described reception, by shelf
Value is revised as the device identification of self, using the value of flag+1 as new flag value, the value of Delay is revised
For self link delay and it is revised as sending the time of described sync message by origin Timestamp
Stamp.
It can be seen that in order to solve the problem that between the physical equipment of VSC, clock synchronizes, the present invention need not
On the premise of increasing hardware interface, for including the VSC equipment of 2 and more than 2 physical equipments, it is achieved
The synchronization of frequency and phase place, and, sync message terminates in stacking opening, does not floods, simultaneously in VSC
Being not limited to the star-like connection of VSC equipment or connected in series, clock network is required by favourable VSC equipment
Support.It should be noted that present disclosure applies equally to IRF (Intelligent Resilient Framework),
VSS (Virtual Switch System), CSS (Cluster Switch System), VC (Virtual Chassis) etc.
Technology.
The above, only presently preferred embodiments of the present invention, it is not intended to limit the protection model of the present invention
Enclose.
Claims (14)
1. a clock synchronizing method based on virtual switch cluster, it is characterised in that described virtual switch collection
Group includes that a primary physical equipment and at least one are sent by each stacking opening from physical equipment, primary physical equipment
Sync message, the method includes:
Receive from primary physical equipment from physical equipment or other are from the sync message of physical equipment, determine self
Synchronization stacking opening；
Described carry out clock synchronization from physical equipment according to the sync message received from described synchronization stacking opening, with
And generate new sync message, and described new sync message is sent by asynchronous stacking opening,
Wherein, described sync message includes: MAC header, EtherType, type of message, sync id flag,
Device identification shelf and line delay Delay.
Method the most according to claim 1, it is characterised in that described determine self from physical equipment
Synchronization stacking opening is:
Described only receive a sync message from physical equipment, it is determined that receive the stacking opening of described sync message
Synchronization stacking opening for self；
Described receive one or more sync message from physical equipment, then according to each sync message, determine
The stacking opening that the minimum sync message of the value of flag+shelf is corresponding is the synchronization stacking opening of self.
Method the most according to claim 1, it is characterised in that when described sync message also includes original
Between stab origin Timestamp.
Method the most according to claim 1, it is characterised in that described reception from physical equipment synchronizes report
After literary composition, the method also includes:
Described from physical equipment receive follow message, described in follow message carry original time stamp origin
Timestamp。
5. according to the method described in claim 3 or 4, it is characterised in that described from physical equipment according to from
The sync message that described synchronization stacking opening receives carries out clock synchronization:
Described from physical equipment by described synchronization stacking opening, use and synchronize ether mode and obtain synchronised clock frequency
Rate；And calculate phase contrast offset=originTimestamp-Delay-T, wherein, T is described from physics
Equipment receives the timestamp of described sync message, afterwards, plus described calculating in present clock phase basis
Phase contrast, as synchronize after clock phase.
6. according to the method described in any one of claims 1 to 3, it is characterised in that described from physical equipment
Generating new sync message is:
Sync message based on described reception, is revised as the device identification of self, by flag+1 by shelf value
Value as new flag value and the link delay that the value of Delay is revised as self.
Method the most according to claim 4, it is characterised in that described generate from physical equipment new same
Step message is:
Sync message based on described reception, is revised as the device identification of self, by flag+1 by shelf value
Value as new flag value, the value of Delay is revised as the link delay of self and by origin
Timestamp is revised as sending the timestamp of described sync message.
8. a clock synchronization apparatus based on virtual switch cluster, it is characterised in that this device includes:
Primary physical equipment and at least one from physical equipment；Wherein,
Described primary physical equipment, for sending sync message by each stacking opening；
Described from physical equipment, for reception, from primary physical equipment or other are from the sync message of physical equipment,
Determine the synchronization stacking opening of self；Sync message according to receiving from described synchronization stacking opening carries out clock synchronization,
And generate new sync message, and described new sync message is sent by asynchronous stacking opening,
Wherein, described sync message includes: MAC header, EtherType, type of message, sync id flag,
Device identification shelf and line delay Delay.
Device the most according to claim 8, it is characterised in that
Described from physical equipment, specifically for when only receiving a sync message, determine the described synchronization of reception
The stacking opening of message is the synchronization stacking opening of self；When receiving one or more sync message, according to each synchronization
Message, determines that the stacking opening that the minimum sync message of the value of flag+shelf is corresponding is the synchronization stacking opening of self.
Device the most according to claim 8, it is characterised in that described sync message also includes original
Timestamp origin Timestamp.
11. devices according to claim 8, it is characterised in that
Described from physical equipment, be additionally operable to follow message receiving to receive after sync message, described in follow and disappear
Breath carries original time stamp origin Timestamp.
12. according to the device described in claim 10 or 11, it is characterised in that
Described from physical equipment, specifically for by described synchronization stacking opening, use synchronization ether mode to obtain
Synchronised clock frequency；And calculate phase contrast offset=originTimestamp-Delay-T, wherein, T is
The described timestamp receiving described sync message from physical equipment, afterwards, adds in present clock phase basis
The phase contrast of upper described calculating, as the clock phase after synchronizing.
13. according to Claim 8 to the device described in 10 any one, it is characterised in that
Described from physical equipment, specifically for sync message based on described reception, shelf value is revised as certainly
The device identification of body, the value of Delay as new flag value and is revised as self by the value of flag+1
Link delay.
14. devices according to claim 11, it is characterised in that
Described from physical equipment, specifically for sync message based on described reception, shelf value is revised as certainly
The device identification of body, using the value of flag+1 as new flag value, the chain that the value of Delay is revised as self
Road postpones and origin Timestamp is revised as sending the timestamp of described sync message.
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| CN201210250325.6A CN103580845B (en) | 2012-07-19 | 2012-07-19 | A kind of clock synchronizing method based on virtual switch cluster and device |
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| CN201210250325.6A CN103580845B (en) | 2012-07-19 | 2012-07-19 | A kind of clock synchronizing method based on virtual switch cluster and device |
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| CN104580183B (en) * | 2014-12-27 | 2019-02-15 | 北京奇虎科技有限公司 | A kind of method of data synchronization and device across cluster |
| CN105897366B (en) * | 2016-04-01 | 2018-09-04 | 浪潮电子信息产业股份有限公司 | A kind of method and system ensureing computer cluster node time consistency |
| CN106712885B (en) * | 2016-12-14 | 2018-12-14 | 北京华为数字技术有限公司 | Clock synchronizing method, the network equipment and network system |
| CN108234321B (en) * | 2016-12-14 | 2021-02-23 | 中兴通讯股份有限公司 | Method and system for forwarding message |
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| CN102195996B (en) * | 2010-03-09 | 2013-06-26 | 杭州华三通信技术有限公司 | Time synchronization method for stacking system, stacking system and member equipment |
| CN102263632A (en) * | 2011-08-26 | 2011-11-30 | 杭州华三通信技术有限公司 | Time synchronization method in switchboard stacking system and stacking controller |
| CN102263633B (en) * | 2011-08-29 | 2014-10-22 | 杭州华三通信技术有限公司 | Clock synchronization method and stacking controller for switch stacking system |
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