From: cannonr (cannonr@attbi.com)
Date: Tue Feb 18 2003 - 23:01:48 GMT-3
With Per packet load-balancing, you are splitting the load on a per-packet
basis. Packet A traverses pipe A, second packet traverses alternate pipe,
etc. In order to achieve per packet load-balancing, you need to have a
routing protocol like Eigrp or OSPF running and must have equal cost paths
to the destination (Unless you are using Variance in EIGRP). BGP doesn't
support it. You also need to either have CEF or process switching enabled
on the interfaces. One other thing you must do is change the load balancing
method from the default method, per destination load-balancing to per-packet
load-balancing (at the interface level). Per packet load-balancing can be
used on PTP links, but it is probably not a good idea to use it on slower
links especially if you are running applications that don't play well with
receiving packets out of sequence..... VOIP...
Per destination load-balancing is the default load-balancing method. If you
have two links to the same destination with the same metric or cost and you
are using a routing pro such as EIGRP or OSPF (works with static routes
too), A flow to destination A will travers pipe A, while a flow to
destination B will traverse pipe B. Per destination LB is kinda nice
because if you are not using QOS and someone is downloading a large file,
they will only monopolize one link.
BGP doesn't technically support load-balancing since it only installs one
route per network in the routing table, however you can get some
load-sharing out of it by taking either partial routes or full routes from
your ISP's. Network A uses Link A, Network B uses link B, etc.
HTH
----- Original Message -----
From: "Gary Duncanson" <gary.duncanson@avt.co.uk>
To: "Casey, Paul (6822)" <Paul.Casey@o2.com>
Cc: <ccielab@groupstudy.com>
Sent: Tuesday, February 18, 2003 6:14 PM
Subject: RE: BGP load sharing or load balancing
> Thanks Paul,
>
> Can you or anyone else please give a definition of load balancing
and load sharing please? I hear a lot about 'per packet' load balancing.
>
> Thanks
>
> -----Original Message-----
> From: Casey, Paul (6822) [mailto:Paul.Casey@o2.com]
> Sent: Wed 19/02/2003 00:12
> To: Gary Duncanson
> Cc:
> Subject: RE: BGP load sharing or load balancing
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