Nexus9k has HSRP MAC for SSH int, but no HSRP config. (?)

[jmaxwellUSAF]

Hello.
I'm trying to enumerate a network path...

SERVER1-(172.16.1.77/24) ==> (Nexus9K= 172.16.1.5/24= vlan333= 01234.5678.9abc) ==> ??

Now, the

SSH interface on this Nexus9k is 172.16.2.1, MAC= 0000.0c07.ac00

By definition, 0000.0c07.ac00 is a HSRP virtual MAC address.

-----
SWITCH9K# sh run | inc standby
(! nothing !)
SWITCH9K# sh standby
% Invalid command at '^' marker.
-----

Questions:
1. Why can't I see a HSRP config here?
2. What is going on here?

Thank you.

[Christopher Hart · Accepted solution]

Hello!

Nexus 9000 series switches run the

 NX-OS 

network operating system, not the

IOS or IOS-XE 

network operating system. The commands used to validate HSRP configuration and operational status are different on

NX-OS 

compared to

 IOS/IOS-XE

To review HSRP configuration on the switch, use the

show running-config hsrp

command. To validate HSRP operational status, use the

show hsrp

series of commands. The

NX-OS

command line's context-sensitive help will aid you in finding more specific commands in the

show hsrp

tree that can narrow down your troubleshooting.

I hope this helps - thank you!

-Christopher

[Andrea Testino · Accepted solution]

Hi there,

show standby

CLI is IOS XE CLI. You mentioned you are using a Nexus 9000 so you would need to use

show hsrp

instead. Example:

N7700-1-WAN# show hsrp brief
*:IPv6 group   #:group belongs to a bundle
                     P indicates configured to preempt.
                     |
 Interface   Grp  Prio P State    Active addr      Standby addr     Group addr
  Vlan22      22   200  P Active   local            10.226.22.3      10.226.22.1     (conf)
  Vlan102     102  200  P Active   local            10.226.102.3     10.226.102.1    (conf)
  Vlan103     103  200  P Active   local            10.226.103.3     10.226.103.1    (conf)
  Vlan104     104  200  P Active   local            10.226.104.3     10.226.104.1    (conf)
  Vlan218     218  200  P Active   local            10.226.10.3      10.226.10.1     (conf)
  Vlan219     219  200  P Active   local            10.226.21.3      10.226.21.1     (conf)

N7700-1-WAN# show hsrp | inc 0c9f|Vlan|IP
Vlan22 - Group 22 (HSRP-V2) (IPv4)
  Virtual IP address is 10.226.22.1 (Cfged)
  Virtual mac address is 0000.0c9f.f016 (Default MAC)
  IP redundancy name is hsrp-Vlan22-22 (default)
Vlan102 - Group 102 (HSRP-V2) (IPv4)
  Virtual IP address is 10.226.102.1 (Cfged)
  Virtual mac address is 0000.0c9f.f066 (Default MAC)

N7700-1-WAN# show run hsrp

!Command: show running-config hsrp
!Running configuration last done at: Wed Jan 18 14:22:22 2023
!Time: Mon Jan 23 10:46:35 2023

version 8.4(5)
feature hsrp


interface Vlan22
  hsrp version 2
  hsrp 22
    preempt
    priority 200
    ip 10.226.22.1
<snip>

Hope that helps.