CN100440800C - Method for realizing regional-field network WAN port TRUNK protection - Google Patents
Method for realizing regional-field network WAN port TRUNK protection Download PDFInfo
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- CN100440800C CN100440800C CNB2005101261137A CN200510126113A CN100440800C CN 100440800 C CN100440800 C CN 100440800C CN B2005101261137 A CNB2005101261137 A CN B2005101261137A CN 200510126113 A CN200510126113 A CN 200510126113A CN 100440800 C CN100440800 C CN 100440800C
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Abstract
The method includes steps: (1) detecting WAN ports of metropolitan area network (MAN) configured on TRUNK group to find out near end failure event on transmission link of MAN; (2) after detected near end failure event by the port, sending notice back to far end WAN port; (3) the port detects protection condition, if condition is satisfied, the method implements TRUNK fail safe action for WAN port of MAN; (4) the port detects recovery condition, if condition is satisfied, the method implements TRUNK protective recovery action for WAN of metropolitan area network. Comparing with prior art, the invention configures LAN and WAN ports to TRUNK group so that if any link occurs failure, the disclosed method can implement protection in order to continue service.
Description
Technical field
The present invention relates to a kind of method that realizes regional-field network WAN port TRUNK protection of SDH (Synchronous Digital Hierarchy) SDH (Synchronous Digital Hierarchy) optical transmission device.
Background technology
Ethernet TRUNK technology is widely used for increasing the link layer bandwidth and is improved availability as the IEEE802.3ad standard.Ethernet TRUNK technology main feature is: 1.TRUNK group link bandwidth increases along with the number of available TRUNK link is linear; 2.TRUNK if having link to lose efficacy in the group, business can continue transmission on remaining available TRUNK link, and the isolated failure link is realized the TRUNK protection of inefficacy link.
Along with based on the extensive use at metropolitan area network of multi-service transport platform MSTP (the Multi-Service Transport Platform) technology of SDH, Ethernet TRUNK technology also is applied in metropolitan area network EPL (the Ethernet Private Line) private line service more and more.By in metropolitan area network EPL business, using the TRUNK technology, can effectively increase the transmission bandwidth of EPL business.Fig. 1 has shown that the typical case of a kind of TRUNK technology in metropolitan area network uses, two Ethernet physics LAN port arrangement become TRUNK group 1 on the A website, corresponding two Ethernet physics LAN port arrangement become TRUNK group 2 on the B website, and TRUNK group 1 links to each other with WAN port 3,4 through the SDH link by metropolitan area network WAN port 1,2 with TRUNK group 2.Ethernet service organizes 1 through the TRUNK group 2 of metropolitan area network WAN port process SDH link transparent transmission to the B website from the A website by TRUNK.Because the metropolitan area network WAN port is transparent fully to the ethernet lan port,, on metropolitan area network, use the TRUNK technology just as using ethernet lan port TRUNK therefore for the user.
Though the TRUNK technology can effectively increase the bandwidth of EPL service link layer, because the TRUNK technology is a special technology at the ethernet mac link layer, its inefficacy link protection mechanism can't realize on metropolitan area network WAN port link layer; If the WAN port link of TRUNK link correspondence lost efficacy in the TRUNK group (such as occurring alarm on the SDH time slot of WAN port correspondence), will cause whole TRUNK group loaded service to interrupt.How to realize the fail safe of TRUNK group in the metropolitan area network, prior art does not also propose feasible program.
Summary of the invention
The objective of the invention is to propose a kind of method that realizes regional-field network WAN port TRUNK protection.It realizes the fail safe of TRUNK group in the metropolitan area network by regional-field network WAN port TRUNK protection mechanism.
A kind of method that realizes regional-field network WAN port TRUNK protection of the present invention, it may further comprise the steps:
1, for the near-end failure event on the WAN port detection metropolitan area network transmission link that is configured to the TRUNK group;
2, after this port detects the near-end failure event, send counter-notification to the far-end WAN port;
3, this port detects protective condition, implements regional-field network WAN port TRUNK fail safe action when satisfying;
4, this port detects the recovery condition, implements metropolitan area network TRUNK protection when satisfying and recovers action.
In the said method, the reason of failure event described in the step 1 is path signal inefficacy TSF, or Trail Signal Degrade TSD.
In the said method, described path signal inefficacy TSF may be SDH channel failure or the inefficacy of Virtual Concatenation or the inefficacy of encapsulation.
In the said method, described Trail Signal Degrade TSD is that error code is out-of-limit.
In the said method, sending counter-notification in the step 2 can be by Ethernet OAM frame or the management frames by encapsulated layer or by the SDH overhead byte etc.By counter-notification, a pair of WAN port that is configured to the TRUNK group just can know mutually whether the other side lost efficacy.
In the said method, the condition of fail safe described in the step 3 is to detect WAN port near-end failure event, or receives the failure event notice of far-end WAN port loopback.
In the said method, the action of fail safe described in the step 3 is to force TRUNK LAN port to lose efficacy, and as forcing TRUNK LAN port LINK DOWN or forbidding this port, triggers the TRUNK protection mechanism of ethernet lan port 802.3ad.
In the said method, the condition of recovery described in the step 4 is that the near-end WAN port is in metropolitan area network TRUNK guard mode and detects the failure event notice that the near-end failure event disappears and do not detect the far-end loopback.
In the said method; protection described in the step 4 recovers action, is to stop to send failure notification to far-end, forces Ethernet TRUNK LAN port to recover; as force TRUNK LAN port LINK UP or reactivate this port, trigger the TRUNK Restoration Mechanism of ethernet ieee 802.3ad.
Adopt the method for the invention; solved the problem that the metropolitan area network WAN port can't be carried out the TRUNK protection, be configured to the LAN and the WAN port of TRUNK group, if any link lost efficacy; can realize the protection of inefficacy link by this method, thereby business is not interrupted.
Description of drawings
Fig. 1 is the schematic diagram of the professional TRUNK configuration set of metropolitan area network EPL;
Fig. 2 is the flow chart of regional-field network WAN port TRUNK protection;
Fig. 3 is the flow chart that regional-field network WAN port TRUNK protection recovers.
Embodiment
The Typical Disposition of the professional TRUNK group of metropolitan area network EPL is as shown in Figure 1: the Ethernet service of Customer 1 and Customer 2 has disposed the TRUNK group of 2 100Mb links to A, B website, and is continuous by WAN port 1,2,3,4 between A, the B website.Ethernet service is through arriving the A website on Ethernet TRUNK post-equalization to the two 100Mbs link, and the A website encapsulates the back from WAN port 1 and the port 2 transparent B websites that are sent to by GFP; The WAN port 3 of B website and port 4 separate after the GFP encapsulation with under the business to two 100Mbs links.Like this, in fact the bandwidth of seeing from user's angle has 200Mbs.
In conjunction with above-mentioned Typical Disposition, be described in further detail the present invention.
1, the WAN port that is configured to the TRUNK group detects the near-end failure event
The WAN port that is configured to TRUNK group detects the near-end failure event on the link, and the reason of failure event may be TSF (for example SDH alarm may be the inefficacy of Virtual Concatenation, also may be the mistake that encapsulates), also may be TSD (for example error code is out-of-limit);
1) detects the GFP decapsulation and lost efficacy, detect LoFD (loss of Frame Delinear) alarm;
2) detecting the erroneous frame (verification mistake, crc error etc.) that GFP receives transfinites;
If condition 1), 2) in an establishment is arranged, think that then the WAN port near-end occurring lost efficacy.
2, after the WAN port that is configured to TRUNK group detects the near-end failure event, counter-notification far-end WAN port
After the WAN port that is configured to TRUNK group detects failure event, counter-notification far-end WAN port.Counter-notification can be by the customer account management frame (such as the customer account management frame of GFP) of encapsulation, notice far-end WAN port;
Lost efficacy if certain WAN port detects near-end, will pass through the customer account management frame (CSF frame) of GFP according to certain frequency counter-notification far-end WAN port.
3, the WAN port that is configured to the TRUNK group detects protective condition, if protective condition satisfies, the WAN port of implementing to protect action to be configured to the TRUNK group detects protective condition:
1) detects the failure event (alarm and the performance of GFP are out-of-limit) of near-end;
2) receive the reverse failure notification (GFP CSF notice) of far-end;
If condition satisfies 1) or 2), the protection action implemented.By force users LAN port LINKDOWN, trigger the TRUNK protection action of IEEE802.3ad, allow Ethernet service on remaining available TRUNK link, transmit, the isolated failure link, as shown in Figure 2.
4, the WAN port that is configured to the TRUNK group detects the recovery condition, if the recovery condition satisfies, implements to recover action
The WAN port that is configured to the TRUNK group detects the recovery condition and satisfies, and implements to recover action.By stopping to insert the failure notification management frames to far-end, force users LAN port LINKUP triggers the TRUNK recovery action of IEEE802.3ad, as shown in Figure 3.
The inventive method can detect the failure event of proximal port by metropolitan area network TRUNK WAN port, and with failure event counter-notification far-end WAN port; Near-end and far-end WAN port are protected the fail safe that realizes TRUNK group in the metropolitan area network by forcing the link failure of TRUNK LAN port thereby trigger ethernet ieee 802.3adTRUNK then.
Claims (7)
1, a kind of method that realizes regional-field network WAN port TRUNK protection is characterized in that it may further comprise the steps:
1) WAN port that is configured to TRUNK group detects the near-end failure event on the metropolitan area network transmission link;
2) after this port detects the near-end failure event, send counter-notification to the far-end WAN port;
3) this port detects the near-end failure event or receives the reverse failure notification of far-end WAN port, triggers the TRUNK protection mechanism, the isolated failure link;
When 4) this port is in the TRUNK protection, detect the reverse failure notification that the near-end failure event disappears and do not detect the far-end loopback, trigger the TRUNK Restoration Mechanism.
2, the method for realization regional-field network WAN port TRUNK protection according to claim 1 is characterized in that, the failure event of near-end described in the step 1) is that path signal lost efficacy or Trail Signal Degrade.
3, the method for realization regional-field network WAN port TRUNK protection according to claim 2 is characterized in that, it is SDH channel failure or the inefficacy of Virtual Concatenation or the inefficacy of encapsulation that described path signal lost efficacy.
4, the method for realization regional-field network WAN port TRUNK protection according to claim 2 is characterized in that, described Trail Signal Degrade is that error code is out-of-limit.
5, the method for realization regional-field network WAN port TRUNK protection according to claim 1 is characterized in that step 2) in send counter-notification by the Ethernet OAM frame or by the management frames of encapsulated layer or by the SDH overhead byte.
6, the method for realization regional-field network WAN port TRUNK protection according to claim 1; it is characterized in that; the protection mechanism of TRUNK described in the step 3) is the TRUNK protection mechanism of ethernet lan port IEEE802.3ad, triggers by forcing TRUNK LAN port to lose efficacy.
7, the method for realization regional-field network WAN port TRUNK protection according to claim 1; it is characterized in that; the Restoration Mechanism of TRUNK described in the step 4) is the TRUNK Restoration Mechanism of ethernet lan port IEEE802.3ad; by stopping to send counter-notification, force Ethernet TRUNK LAN port to recover to trigger to far-end.
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| CNB2005101261137A CN100440800C (en) | 2005-11-30 | 2005-11-30 | Method for realizing regional-field network WAN port TRUNK protection |
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| CNB2005101261137A CN100440800C (en) | 2005-11-30 | 2005-11-30 | Method for realizing regional-field network WAN port TRUNK protection |
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| CN100440800C true CN100440800C (en) | 2008-12-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101378364B (en) * | 2008-09-25 | 2011-01-19 | 杭州华三通信技术有限公司 | Method and unit for scheduling WAN outlet |
| CN101808043B (en) * | 2010-03-12 | 2012-09-05 | 成都市华为赛门铁克科技有限公司 | Method and device for detecting service message forwarding state of TRUNK members |
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| US20040037278A1 (en) * | 1998-02-13 | 2004-02-26 | Broadcom Corporation | Load balancing in link aggregation and trunking |
| CN1501642A (en) * | 2002-11-14 | 2004-06-02 | ��Ϊ��������˾ | A method for transferring connection state of Ethernet port |
| US6804233B1 (en) * | 1997-07-08 | 2004-10-12 | Hewlett-Packard Development Company, L.P. | Method and system for link level server/switch trunking |
| CN1588842A (en) * | 2004-09-30 | 2005-03-02 | 西安西电捷通无线网络通信有限公司 | Method for increasing radio city area network safety |
| CN1691550A (en) * | 2004-04-21 | 2005-11-02 | 华为技术有限公司 | Service protection device in optical communication network and method thereof |
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Patent Citations (5)
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|---|---|---|---|---|
| US6804233B1 (en) * | 1997-07-08 | 2004-10-12 | Hewlett-Packard Development Company, L.P. | Method and system for link level server/switch trunking |
| US20040037278A1 (en) * | 1998-02-13 | 2004-02-26 | Broadcom Corporation | Load balancing in link aggregation and trunking |
| CN1501642A (en) * | 2002-11-14 | 2004-06-02 | ��Ϊ��������˾ | A method for transferring connection state of Ethernet port |
| CN1691550A (en) * | 2004-04-21 | 2005-11-02 | 华为技术有限公司 | Service protection device in optical communication network and method thereof |
| CN1588842A (en) * | 2004-09-30 | 2005-03-02 | 西安西电捷通无线网络通信有限公司 | Method for increasing radio city area network safety |
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