From: Mike Williams (ccie2be@swbell.net)
Date: Sat Sep 06 2003 - 00:34:23 GMT-3
Good call on this. And to the poster who posted the section about how
the MSFC can only do per-packet CEF in software....... Very
interesting..... If there's not a L3 switching entry on the PFC2 (it
specifically mentioned the PFC2, not the PFC... Dunno why) then CEF on
the MSFC can handle the packet, however, it occurs to me that CEF load
balancing won't get a chance to work because after the first packet is
handled by CEF on the MSFC, then the PFC will have a L3 switching entry
for it, and would take it from there for the rest of the flow.....
Wow.......
Mike W.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
asadovnikov
Sent: Thursday, September 04, 2003 11:13 PM
To: 'Mike Williams'; 'Hugo Padilla Prad '; 'Brian McGahan';
'zhang-meng'; 'Ccielab (E-mail)'
Subject: RE: Cisco 6506 and BGP problem
Most of the packets are not switched by MSFC. The actual packets are
switched wither by PFC (or DFC). Depending on hardware PFC would either
do distributed CEF or mls flow switching. I trust in either case PFC
hardware will not be able to do per-packet. I do not dispute the idea
though - on average per source-destination pair loadbalancing should
provide as good distribution (and may even be better as it less likely
to put the packets out of the order).
Best regards,
Alexei
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mike Williams
Sent: Thursday, September 04, 2003 11:28 PM
To: 'Hugo Padilla Prad '; 'Brian McGahan'; 'zhang-meng'; 'Ccielab
(E-mail)'
Subject: RE: Cisco 6506 and BGP problem
I don't see why it wouldn't. If you're using and MSFC/MSFC2 you can use
CEF for load balancing or even just equal-cost path load balancing (I'm
using Native IOS but I'm sure that running IOS on an MSFC on a 65xx in
Hybrid mode would use these features are they're IOS based). I think
Brian's idea is a perfect idea that's both simple and effective.
Mike W.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Hugo Padilla Prad
Sent: Thursday, September 04, 2003 10:09 PM
To: 'Brian McGahan'; 'zhang-meng'; 'Ccielab (E-mail)'
Subject: RE: Cisco 6506 and BGP problem
Brian,
My understanding is that 6506 doesn't support per-packet load balance.
Regards,
-Hugo
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brian McGahan
Sent: Thursday, September 04, 2003 10:18 AM
To: 'zhang-meng'; 'Ccielab (E-mail)'
Subject: RE: Cisco 6506 and BGP problem
Meng,
Why not just put two static default routes? With CEF you can
load balance between these routes on a per-packet or per-destination
basis.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-334-8987
Direct: 708-362-1418 (Outside the US and Canada)
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
zhang-meng
Sent: Thursday, September 04, 2003 4:02 AM
To: Ccielab (E-mail)
Subject: Cisco 6506 and BGP problem
Hi: Group
A problem, I want to use 6506 (with layer 3 function) to connect
with two ISP(using two 1000BaseT port) load balance, but Tel can't
support BGP, they worried statibility.
What kinds of solution and Could you give some suggestion and
design.
Regards
Meng Zhang
This archive was generated by hypermail 2.1.4 : Wed Oct 01 2003 - 07:24:24 GMT-3