Hey Cydon,
> From: Cydon Satyr [mailto:cydonsa...@gmail.com] > Sent: Thursday, October 29, 2015 10:55 PM > Hey all, > Adam I believe that is correct. If I remember this, if it's something other > than > 0x4/0x6 Trio chip looks at bits after first 12 bytes; if it's 0x0800/0x86dd > it still > load balances this packet based on IPv4/IPv6 rules, and if it's 0x8100 it > skips > up to two vlan headers and again checks for real ethertype. If it's something > other than this it stops and just load balances used MPLS tags. > So if there's CW, it still check for three things above (since CW doesn't > start > with 0x4/0x6), and then just fails. I think... > How would router be certain of packet type based on packet length? > Also since hashing is decided on ingress PFE if next-hop is aggregate/ecmp, > trio only looks at first 128bytes or so. So probably looking at 0x4/0x6 is the > cheapest/fastest way of guessing without performance penalty... > Somebody correct me if I'm wrong > BR > For labelled traffic it should be: label 1-5 (by default) MPLS Payload (L3-header for L3VPN packets or L2-header for L2VPN/PW packets) And the LU chip should receive 320B chunk so there should be enough space to base the hash on 5Labels,CW,DMAC,SMAC,2VLANs,DIP,SIP,DPort,SPort but I don’t know if it’s implemented like this –it needs to be tested and documented. adam Adam Vitkovsky IP Engineer T: 0333 006 5936 E: adam.vitkov...@gamma.co.uk W: www.gamma.co.uk This is an email from Gamma Telecom Ltd, trading as “Gamma”. The contents of this email are confidential to the ordinary user of the email address to which it was addressed. This email is not intended to create any legal relationship. No one else may place any reliance upon it, or copy or forward all or any of it in any form (unless otherwise notified). If you receive this email in error, please accept our apologies, we would be obliged if you would telephone our postmaster on +44 (0) 808 178 9652 or email postmas...@gamma.co.uk Gamma Telecom Limited, a company incorporated in England and Wales, with limited liability, with registered number 04340834, and whose registered office is at 5 Fleet Place London EC4M 7RD and whose principal place of business is at Kings House, Kings Road West, Newbury, Berkshire, RG14 5BY. _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
