Ping failed from APIC to SPINE via inband management

[Ming Keat Pang]

Good day

I'm setup up the inband management and pump into issue that APIC is not able to ping to any SPINE node but only leaf nodes via the inband management.

I had follow below link to specific the source interface on APIC in order to ping SPINE however still not pingable.

Testing:

• Ping to the In-band management IP addresses of APIC, Spine and Leaf switches from one of the Spine switches: OK
• Ping to the In-band management IP addresses of APIC, Spine and Leaf switches from one of the Leaf switches: OK
• Ping to the In-band management IP addresses of APIC and Leaf switches from one of the APICs: OK
• Ping to the In-band management IP addresses of Spine switches from one of APICs: NG

https://www.cisco.com/c/en/us/td/docs/switches/datacenter/aci/apic/sw/kb/b_KB_Configuring_Static_Management_Access.html#concept_CFF63FEBE947424291B0F10E6F23DA7D

• A simple ping to a spine switch will fail if it generates an ARP request, because spine switches do not respond to ARP requests. When pinging a spine switch from APIC, you must specify the source interface/address so that APIC does not send an ARP request.

Have anyone have the experience on inband management and face similar issue? Anyway could make it reachable.

Thank you

MK

[Ming Keat Pang · Accepted solution]

The workaround is to specify the source IP address when execute ping, and now the SPINE is reachable from APIC.

ping -I (SPINE IP) (destination IP), example as below.

APIC1#ping 172.0.0.129 -I 172.0.0.122

PING 172.0.0.129 (172.0.0.129) from 172.0.0.122 : 56(84) bytes of data.

64 bytes from 172.0.0.129: icmp_seq=1 ttl=63 time=0.196 ms

64 bytes from 172.0.0.129: icmp_seq=2 ttl=63 time=0.190 ms