Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header

Just thought I'd share some operational info. PFC3B will by default punt IPv6 packets with fragmentation header to RP and route them there, with the obvious performance penalty this incurs. Workaround is to change this behaviour, meaning ACLs won't work for packets with fragmentation header anymore: #platform ipv6 acl fragment hardware ? drop Drop IPv6 fragments at hardware forward Forward IPv6 fragments at hardware PFC3C is supposed to not be affected. A lot of Teredo and 6to4 traffic has fragmentation headers, so this actually is a real problem. We discovered this at our Teredo relay upstream router. -- Mikael Abrahamsson email: swmike@swm.pp.se