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C9300 ARP issue

m1xed0s
Contributor
Contributor

I have a simple ARP issue that I can not figure out a fix on C9300, which is running Version 17.06.03.

Referencing topology below, the C9300 has vlan 700 SVI with its IP. The CORE is the default gateway for VLAN 700. But C9300 just can not ping its default gateway. The ARP entry for the 10.10.70.1 is incomplete...The CORE and C9300 are running dynamic routing protocol to exchange routes. If I do a reboot of the C9300, it fixes the issue until ARP timeout...

The 2960 in the middle is L2 only just to bridge the VLANs. 

Here is the output of the debug ARP.

Sep 29 13:12:54.400 EST: IP ARP: sent req src 10.10.70.18 4006.a572.a373,
dst 10.10.70.1 0000.0000.0000 Vlan700
Sep 29 13:12:54.402 EST: IP ARP rep filtered src 10.20.70.1 11a3.1190.abbb, dst 10.20.70.18 4006.a572.a373 it's our address tableid 0.

Honestly it is not really clear what does that filtered message trying to say...I do have proxy-arp disabled under VLAN 700 interface on C9300...Any suggestions?

T1.jpg

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