Method and apparatus for designated router seamless switchover
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsWei Xu, Shuxia Tai, Huajie Guo, Lei Zhou
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Abstract
Embodiments of the present disclosure provide method and apparatus for Designated Router (DR) seamless switchover. A method performed by a network device comprises detecting a DR failure event due to a failure DR. The method further comprises detecting that the second edge device is unreachable. The method further comprises holding refresh of router-Link State Advertisements (router-LSA) in a link-state database and flooding procedure, when a Backup Designated Router (BDR) has not declared to be a working DR in an Open Shortest Path First (OSPF) network.
Claims20
A method performed by a network device comprising:
- detecting a designated router (DR) failure event;
- and
- after detecting the designated router failure event and when a backup designated router (BDR) has not declared to be a working designated router, (i) refraining from refreshing router-Link State Advertisements (LSA) in a link-state database and (ii) refraining from performing a flooding procedure.
A method performed by a network device, when a network-Link State Advertisement (LSA) message is received or a timer is expired, the method comprises:
- refreshing router-LSA in a link-state database;
- and
- performing a flooding procedure, wherein the refreshing router-LSA in the link-state database and performing the flooding procedure have been refrained from due to a designated router (DR) failure event.
A network device, comprising:
- one or more processors;
- and
- one or more memories comprising computer program codes,
- the one or more memories and the computer program codes configured to, with the one or more processors, cause the network device at least to perform:
- detecting a designated router (DR) failure event;
- and
- after detecting the designated router failure event and when a backup designated router (BDR) has not been declared to be a working designated router, (i) refraining from refreshing router-Link State Advertisements (LSA) in a link-state database and (ii) refraining from performing a flooding procedure.
Dependencies are inferred from the claim text.