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Cisco Bug: CSCvv92956 - ARP entries getting in Default VRF randomly when we use "ip unnumbered" under the SVI

Last Modified

Oct 07, 2020

Products (1)

  • Cisco Catalyst 9500H Series Switches

Known Affected Releases

17.1.1 17.2.1 17.3.1

Description (partial)

Symptom:
ARP entries for SVI uses "ip unnumbered loopback" instead of static IP address, and assigned in non-Default VRF, are getting learned randomly in Default VRF.

also, Static routes installed by DHCP gateway, appear under "show ip route dhcp" instead of "show ip route vrf VRF_Name dhcp"

Conditions:
[+] use "ip unnumbered loopback" under SVI in non-Default VRF.

[+] running IOS version in 17.x train (the issue doesn't appear in 16.12.x train)
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