Invention Grant
US09537756B2 Method for synchronized BGP and VRRP failover of a network device in a network 有权
网络中网络设备的同步BGP和VRRP故障转移方法

Method for synchronized BGP and VRRP failover of a network device in a network
Abstract:
A network device which communicates with peers using Border Gateway Protocol (BGP) advertises to one or more peers a first Multi-Exit Discriminator (MED) when all sessions are in ‘established’ state, and a second MED when one or more sessions are in a non-‘established’ state. The second MED is higher than the first MED and higher than the MED advertised by the backup network device, causing peers to prefer the backup device. If the device is also configured for Virtual Router Redundancy Protocol (VRRP), when the device advertises the first MED, virtual routers are transitioned to ‘master’ state, and when the device advertises the second MED, virtual routers are transitioned to ‘backup’ state.
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