Cisco Bug: CSCur36711 - EPN::ASR920/RSP2 ARP (untagged) packet drop over PE-HE tunnel from ASR9K
Sep 17, 2019
- Cisco ASR 920 Series Aggregation Services Router
Known Affected Releases
15.4(3)S1.1 15.5(1)S 15.5(2)S
Symptom: ARP packet drop over PW-HE/R-PW tunnel from ASR9K Conditions: This is seen when ARP packet is untagged and is sent over PW-HE or R-PW from ASR9K. ARP packet after stripping the MPLS and outermost L2 headers leaves behind 42B packet which gets dropped in ASR920/RSP2 in the egress due to minimum MTU check of 46B. This works if the ARP packet carries additional VLAN header.
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Bug Details Include
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