Users Guide

Table Of Contents

VLT upgrade with minimal loss in a VLT or VXLAN topology if

network statements are used to advertise BGP prefixes

NOTE: The following procedure is not applicable when upgrading to 10.5.2.6 or future releases from 10.5.1.x releases. You

can directly upgrade VLT nodes from 10.5.1.x to 10.5.2.6 or future release.

NOTE:

● This section is applicable only if network statements are used under address-family {ipv4|ipv6} unicast to

advertise prefixes that are present in both VLT peers.

● If you have not used network statements and instead used redistribute connected to advertise prefixes, you

avoid this additional step.

● If the prefix advertised using a network statement is present only on one of the VLT peers, you avoid this additional

step for those prefixes alone.

This section covers the additional steps needed to achieve a VLT upgrade to 10.5.2.6 or later from a 10.5.0.x or 10.4.3.x release

with minimal traffic loss in a VLT or VXLAN topology.

NOTE: The steps in the following example are for IPv4. Follow the same steps for IPv6 where applicable.

1. Apply a route map to set the origin as IGP for the prefixes on both VLT peers in a VLT domain one after the other.

OS10# configure terminal

OS10(config)# route-map set_origin

OS10(config-route-map)# set origin igp

OS10(config-route-map)# exit

OS10(config)# router bgp <AS-Number>

OS10(config-router-bgp-<AS-Number>)# address-family ipv4 unicast

OS10(configure-router-bgpv4-af)# network <prefix> route-map set_origin

OS10(configure-router-bgpv4-af)# end

OS10#

2. Follow the VLT min-loss upgrade procedure outlined above.

3. Remove the route-map on both VLT peers one after the other.

OS10(config)# router bgp <AS-Number>

OS10(config-router-bgp-<AS-Number)# address-family ipv4 unicast

OS10(configure-router-bgpv4-af)# no network <prefix> route-map set_origin

OS10(configure-router-bgpv4-af)# network <prefix>

OS10(configure-router-bgpv4-af)#

For more information on the network command, see the BGP commands section in the Dell EMC SmartFabric OS10 User

Guide.

Upgrade from OS9 to OS10

When you upgrade an OS9 switch to OS10, the first step is to uninstall OS9 using the ONIE: Uninstall OS option on the ONIE

boot menu. The Uninstall option deletes the OS9 configuration and all disk partitions. After you uninstall OS9, follow the steps to