Nexus 9K IS-IS Underlay VxLAN

[ThomasCampbell64]

Trying to configure IS-IS for the underlay network for VxLAN and can't seem to form and adjacency.

Can someone spot what might be causing my adjacency not to form?

Spine:

interface Ethernet1/1
no switchport
mtu 9216
medium p2p
ip unnumbered loopback0
isis network point-to-point
isis circuit-type level-2
ip router isis 1
no shutdown

interface loopback0
description SW01_Loopback
ip address 192.168.0.1/32
isis metric 110 level-2
isis network point-to-point
isis circuit-type level-2
no isis passive-interface level-2
icam monitor scale

router isis 1
net 49.0001.1111.1111.1111.00
is-type level-2
metric-style transition
log-adjacency-changes
address-family ipv4 unicast
advertise interface loopback0 level-2

Leaf:

interface Ethernet1/1
no switchport
mtu 9216
medium p2p
ip unnumbered loopback0
isis network point-to-point
isis circuit-type level-2
ip router isis 1
no shutdown

interface loopback0
description SW03_Loopback
ip address 192.168.0.3/32
isis metric 110 level-2
isis network point-to-point
isis circuit-type level-2
no isis passive-interface level-2
icam monitor scale

router isis 1
net 49.0001.3333.3333.3333.00
is-type level-2
metric-style transition
log-adjacency-changes
address-family ipv4 unicast
advertise interface loopback0 level-2

[M02@rt37]

Hello @ThomasCampbell64 

Use Lo0 as RID.

Adjust please like this configuration:

Spine:

interface Ethernet1/1
no switchport
mtu 9216
medium p2p
ip unnumbered loopback0
isis network point-to-point
ip router isis 1
no shutdown

interface loopback0
description SW01_Loopback
ip address 192.168.0.1/32
ip router isis 1

router isis 1
net 49.0001.1111.1111.1111.00
is-type level-2-only
router-id Loopback0

Leaf:

interface Ethernet1/1
no switchport
mtu 9216
medium p2p
ip unnumbered loopback0
isis network point-to-point
ip router isis 1
no shutdown

interface loopback0
description SW03_Loopback
ip address 192.168.0.3/32
ip router isis 1

router isis 1
net 49.0001.3333.3333.3333.00
is-type level-2-only
router-id Loopback0

---

Provide us this outpu

#show isis neigbors

[Harold Ritter · Accepted solution]

Hi @ThomasCampbell64 ,

I just tried your configuration as is and the isis adjacency came up without an issue.

I am running NXOS 10.4.2F. What NXOS version are you running?

You might want to run "debug isis adjacency" to find out what is going on.

Regards,

[ThomasCampbell64]

Thanks Harold!

Was running NXOS 9.3.13, upgrading the OS has fixed the issue.

Kind regards,

Tom

[Harold Ritter]

You are very welcome @ThomasCampbell64 and thanks for the feedback