option 212 for 6RD
swmike at swm.pp.se
Sat Jan 19 11:47:27 CET 2013
On Sat, 19 Jan 2013, Erik Kline wrote:
> But if the tunnel pretends the MTU is 1500 and fragments such a packet
> into two packets of 1480 + 20 (the outer protocol is IPv4, after all),
> what is the problem? Are people worried about the Segmentation and
> Reassembly workload on the BR or something?
Oooh, yes, I definitely don't what the BR to do any kind of re-assembly.
That'll limit the number of platforms that can be used for 6RD severely, a
lot of the good price/performance ones are stateless and do not do
re-assembly. Strictly speaking, having them to MSS adjust is a performance
problem there already. Think Cisco 7600, hardware forwarding is good, CPU
resources to manipulate packets is limited.
Mikael Abrahamsson email: swmike at swm.pp.se
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