Cisco Bug: CSCsz78279 - UDL ARP should be disabled on a tunnel if "udlr send-only" removed
Feb 15, 2018
- Cisco IOS
Known Affected Releases
Symptom: UDLR ARP may be enabled on a receive-only tunnel interface. It should only be set on a send-only tunnel interface. See below configuration for details. R1(config)#int tun0 R1(config-if)#tunnel udlr address-resolution %UDL Tunnel ARP is for transmit-only tunnel interfaces R1(config-if)#tunnel udlr send-only e1/1 R1(config-if)#tunnel udlr address-resolution R1(config-if)#no tunnel udlr send-only e1/1 R1(config-if)#tunnel udlr receive-only e1/0 R1(config-if)#do sh run | sec Tunnel0 interface Tunnel0 no ip address tunnel udlr receive-only Ethernet1/0 tunnel udlr address-resolution R1(config-if)# Conditions: Only occurs when a send-only tunnel interface is changed to receive-only.
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