02-07-2025 04:02 AM
Hello everyone,
I am trying to set up a vpc topology where I connect two borders leafsdirectly to different cpds using level 3 and vxlan. The vpc is for traditional vlans.
The problem I have is that I don't see traffic on nve interface 1.
nve1 is up
admin state is up, Hardware: NVE
MTU 9216 bytes
Encapsulation VXLAN
Auto-mdix is turned off
RX
ucast: 0 pkts, 0 bytes - mcast: 0 pkts, 0 bytes
TX
ucast: 0 pkts, 0 bytes - mcast: 0 pkts, 0 bytes
I see that the mac apparently announces itself but it seems that the next hop is not valid.
I see the next error:
Nexus3# show bgp l2vpn evpn detail
BGP routing table information for VRF default, address family L2VPN EVPN
Route Distinguisher: 11.1.1.1:33067 (L2VNI 300)
BGP routing table entry for [2]:[0]:[0]:[48]:[5021.ba00.1400]:[0]:[0.0.0.0]/216,
version 27
Paths: (1 available, best #0)
Flags: (0x000102) (high32 00000000) on xmit-list, is not in l2rib/evpn, is not i
n HW
Path type: local, path is invalid(rnh not resolved), no labeled nexthop
AS-Path: NONE, path locally originated
100.1.1.1 (inaccessible, metric 4294967295) from 0.0.0.0 (11.1.1.1)
Origin IGP, MED not set, localpref 100, weight 32768
Received label 300
Extcommunity: RT:65003:300 ENCAP:8
BGP routing table entry for [2]:[0]:[0]:[48]:[5021.ba00.1400]:[32]:[192.168.0.2]
/248, version 28
Paths: (1 available, best #0)
Flags: (0x000102) (high32 00000000) on xmit-list, is not in l2rib/evpn, is not i
n HW
Path type: local, path is invalid(rnh not resolved), no labeled nexthop
AS-Path: NONE, path locally originated
100.1.1.1 (inaccessible, metric 4294967295) from 0.0.0.0 (11.1.1.1)
Origin IGP, MED not set, localpref 100, weight 32768
Received label 300
Extcommunity: RT:65003:300 ENCAP:8
I tryed to add ipv4 adress family unicast and neighbord but don't work.
Any idea?.
I attach the nexus 1 and 3 config.
Thanks in advance,
Topology
02-07-2025 04:38 AM
Announce Lo1 to ISIS
interface lo1
ip router isis prueba
02-09-2025 11:51 PM
Hi,
Sorry i forget to add this command on the configuration i sent but was configure and i deleted when testing. I will put again.
Thanks, any other idea?.
King regards
02-10-2025 01:23 AM
Hi,
Good morning,
I have added the command to the config that I had deleted and I pass it through now. Something very strange happens, Nexus 1 stops receiving the announcement of loopback 1 from router Nexus 3 if I apply loopback one on router 3 as a source of interdace nve1, and bgp must be reachable. It happens every time I do that but only from router 3. Router 1 does it fine.
Thanks and king regards,
Mauricio
02-07-2025 04:42 AM
Also for VPC source loopback for NVE interface should be configured in specific way
The loopback address used by NVE needs to be configured to have a primary IP address and a secondary IP address.
The secondary IP address is used for all VXLAN traffic that includes multicast and unicast encapsulated traffic
02-09-2025 11:52 PM
Thanks, ok i will try to add a secondary ip address on lo1.
Thanks and king regards,
Mauricio
02-10-2025 01:24 AM
Good morning,
I have added the command to the config that I had deleted and I pass it through now. Something very strange happens, Nexus 1 stops receiving the announcement of loopback 1 from router Nexus 3 if I apply loopback one on router 3 as a source of interdace nve1, and bgp must be reachable. It happens every time I do that but only from router 3. Router 1 does it fine.
02-10-2025 01:25 AM
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