nanog mailing list archives
Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header
From: Mikael Abrahamsson <swmike () swm pp se>
Date: Fri, 30 Sep 2011 07:07:50 +0200 (CEST)
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
Current thread:
- Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Mikael Abrahamsson (Sep 29)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Christopher Morrow (Sep 29)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Mikael Abrahamsson (Sep 29)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Saku Ytti (Sep 30)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Christopher Morrow (Sep 30)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Saku Ytti (Sep 30)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Christopher Morrow (Sep 30)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Saku Ytti (Sep 30)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Nick Hilliard (Sep 30)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Mohacsi Janos (Sep 30)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Nick Hilliard (Sep 30)
- Re: Cisco 7600 PFC3B(XL) and IPv6 packets with fragmentation header Christopher Morrow (Sep 29)