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 Title: |
EP1006702A3:
Method and apparatus providing for an improved VRRP (Virtual Router Redundancy Protocol)[German][French]
[ Derwent Title ]
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Country:
Kind: |
EP European Patent Office (EPO)
A3 SEARCH REPORT i
(See also:
EP1006702A2 )
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| Inventor: |
Srikanth, Ayikudy K;
Mujeeb, Hamayon;
Meehan, Tom;
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| Assignee: |
NORTEL NETWORKS CORPORATION
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| Published / Filed: |
2000-06-14
/ 1999-12-03
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| Application Number: |
EP1999000309720
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| IPC Code: |
Advanced:
H04L 12/56;
H04L 29/14;
Core:
more...
IPC-7:
H04L 12/56;
H04L 29/14;
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| ECLA Code: |
H04L12/56S12A; H04L12/56C; H04L29/14; T04L12/56W8; T04L12/56W25;
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| Priority Number: |
| 1998-12-04 |
US1998000205084 |
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| Abstract: |
A router attached to a network is a member of a virtual router for the network in accordance with VRRP. A port or interface on the router other than a port that attaches the router to the network is specified as critical. VRRP is not enabled for the critical port. (Alternatively, VRRP may be enabled for the critical port to provide routing redundancy for a different network and would not affect the virtual router associated with this network). If the critical port on a master virtual router fails or is otherwise unable to forward packets, a state change is nevertheless triggered within the VRRP finite state machine that exists at the port on the master virtual router for which VRRP is enabled. The change in the VRRP finite state machine triggers the router to transition from the master virtual router to the new backup virtual router. The master virtual router can directly notify the backup virtual router to transition to master virtual router by transmitting a VRRP packet commanding the backup virtual router to become the master virtual router.
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| Attorney, Agent or Firm: |
Dearling, Bruce Clive ;
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| INPADOC Legal Status: |
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| Designated Country: |
AL AT BE CH CY DE DK ES FI FR GB GR IE IT LI LT LU LV MC MK NL PT RO SE SI
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| Family: |
Show 3 known family members
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First Claim:
Show all claims |
1. A method for transitioning responsibility for routing data traffic among routers in a network in which a first router is coupled to the network via a first port and a second router is coupled to the network via a first port, the method comprising:-
- a) configuring the first router to function as a master virtual router for the network; and
- b) configuring the second router to function as a backup virtual router for the network; and
- c) if a port on the first router other than the first port fails, transitioning the first router to function as the backup virtual router for the network and transitioning the second router to function as the master virtual router for the network, there being provided transitioning means operable to effect the aforesaid transitioning of the first and second routers.
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Description
Expand description |
The present invention is related to data communications. In particular, the present invention is related to providing improved routing redundancy in a statically configured routing environment using the virtual routing redundancy protocol (VRRP).
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