05-22-2019 01:42 AM
becase we config peer-gateway and peer-switch feature under vpc .
I config vxlan underlay backup routing between two VPC leafs across peer-link
config like below url said at bottom
one question:
backup routing interface vlan just exist on peer-link , but when we config peer-switch on both leafs.
we found this vlan is putted into spanning tree backup state, and interfave vlan can't get up
and ospf can't established,
so i change this vlan spanning tree priority on one leaf switch , and spanning tree state on this vlan ( peer-link interface) change to forwarding。
is there other solution to resolve this problem?
thank you!
Jere
Enabling vpc peer-gateway configuration is mandatory. For peer-gateway functionality, at least one backup routing SVI is required to be enabled across peer-link and also configured with PIM. This provides a backup routing path in the case when VTEP loses complete connectivity to the spine. Remote peer reachability is re-routed over peer-link in his case. In BUD node topologies, the backup SVI needs to be added as a static OIF for each underlay multicast group.
05-29-2019 07:02 AM
Hi,
Did you configure the Vlan on both VPC Peers?
May I ask, what is the version of NxOS running when you attempted to implement it?
06-11-2019 08:25 AM
Did you also remember to configure system nve infra-vlans <vlan-id> force for the vlan you are using for the backup routing SVI?
04-22-2022 07:19 AM
Hi ,
I'm trying today on 93180YC-FX3 with 9.3.8 release, the configuration as follow:
interface Vlan1 description L3 Peer-Link no shutdown mtu 9216 medium p2p no bfd echo no ip redirects ip address 100.100.133.254/31 no ipv6 redirects ip ospf cost 1 ip ospf network point-to-point ip router ospf UNDERLAY area 0.0.0.0 ip ospf bfd ip pim sparse-mode
for now everythings work correctly (I've tested a failover) , in next days I'll do other test to discover something strange.
P.S. I've choosed VLAN 1 because it can't be configured in VXLAN neither per mistake, maybe the command system nve infra-vlans <vlan-id> do the same thing on another VLAN?
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