Friday, March 20, 2020

VxLAN Configuration in NXOS CLI

when vxlan configurations specify the multicast group for BUM traffic, how do you know what IP address to input and what typically does that IP represent?

Example:

!
feature vn-segment-vlan-based
feature nv overlay 
!
vlan 10
  vn-segment 10010   ------> 10010 is VNID

interface nve1
  no shutdown
  source-interface loopback0
  member vni 10010 mcast-group 230.1.1.1 

interface eth1/2
!
ip pim sparse-mode

interface loopback0
  ip address 10.1.1.1/32
  ip address 10.1.1.10/32 secondary
  ip router ospf 9k area 0.0.0.0
  ip pim sparse-mode 

!
feature vpc
!
vpc domain 1
  peer-switch
  peer-keepalive destination 10.31.113.41 source 10.31.113.40
  peer-gateway
!
interface port-channel1
  vpc peer-link
!
interface port-channel112
  vpc 112
!

I was going to guess like a IP dedicated to the VNI for both segment configurations, but I have no idea and I haven't seen it specified anywhere as to how you derive the IP to be used for that section.



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