Dell PowerSwitch S5212F-ON EMC SmartFabric OS10 User Guide Release 10.5.1 - Page 1413
Example configuration, Support for new streams during VLTi failure, In the following
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Configure the VLT backup link using the backup destination {ip-address | ipv6 ipv6-address} [vrf management] [interval interval-time]. The interval range is from 1 to 30 seconds. The default interval is 30 seconds. Irrespective of the interval that is configured, when the VLTi link fails, the system checks for the heartbeat connection without waiting for the timed intervals, thus allowing faster convergence. NOTE: The VLT domain and the backup parameters are auto-configured in the SmartFabric Services mode from release 10.5.0 onwards. Example configuration: OS10(config)# vlt-domain 1 OS10(conf-vlt-1)# backup destination 10.16.151.110 vrf management interval 20 OS10(config)# vlt-domain 1 OS10(conf-vlt-1)# backup destination ipv6 1::1 vrf management interval 20 The following examples describe different cases where the VLT backup link is used: In the following figure, the backup link is not configured: Support for new streams during VLTi failure If the VLTi fails, MAC addresses that are learned after the failure are not synchronized with VLT peers. Thus, instead of unicast, the VLTi failure causes a continuous traffic flood. If the VLTi links fail, MAC and ARP synchronization does not happen, and it causes the system to flood L2 packets and drop L3 packets. Virtual Link Trunking 1413
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