[j-nsp] per packet/flow load balancing.

[Andrew Ramsey]

Jonathan,

If you're trying to balance a *single* flow across multiple links, "load-balance per-packet" will not do it.  If your trying to balance *multiple* flows across multiple links, "load-balance per-packet" will do it.

Andy

>-----Original Message-----
>From: Jonathan Tse [mailto:jonathantse@pacific.net.sg]
>Sent: Monday, November 25, 2002 11:28 AM
>To: Ben Buxton; juniper-nsp@puck.nether.net
>Subject: Re: [j-nsp] per packet/flow load balancing.
>
>
>So that means the "load-balance per-packet" is useless?
>
>
>----- Original Message -----
>From: "Ben Buxton" <b.buxton@planettechnologies.nl>
>To: "'Jonathan Tse'" <jonathantse@pacific.net.sg>;
><juniper-nsp@puck.nether.net>
>Sent: Tuesday, November 26, 2002 12:22 AM
>Subject: RE: [j-nsp] per packet/flow load balancing.
>
>
>>
>> Since the IP2 processor, load balancing per packet is a bit of
>> a misnomer. A modern Juniper will load balance per *flow*,
>> even though the config says per-packet.
>>
>> You cannot do true per packet load balancing on a Juniper. Which
>> is a good thing at the datarates they're designed for.
>>
>> So if you're measuring with a single flow, this might explain it.
>>
>> BB
>>
>> -----Original Message-----
>> From: Jonathan Tse [mailto:jonathantse@pacific.net.sg]
>> Sent: maandag 25 november 2002 16:59
>> To: juniper-nsp@puck.nether.net
>> Subject: [j-nsp] per packet/flow load balancing.
>>
>>
>> Hi,
>>
>> This has been discussed many times here. Apologize if 
>someone think this
>is
>> too simple. But only now I give it a try and without luck.
>>
>> I have setup this in the test lab:
>>
>>            /-- IBGP -- router A -- EBGP --\
>> router C <                                 > router D
>>            \-- IBGP -- router B -- EBGP --/
>>
>> I believe there are equal cost paths but the router C 
>doesn't seem to be
>> able the load balance per packet.
>>
>> Below is a snapshot from router C:
>>
>> 192.168.44.0/22    *[BGP/170] 19:07:50, MED 90, localpref 350, from
>> 192.168.9.2
>>                       AS path: 64665 64665 I
>>                       to 192.168.4.1 via ge-0/1/0.0
>>                     > to 192.168.4.2 via ge-0/1/0.0
>> 192.168.48.0/22    *[BGP/170] 19:07:50, MED 90, localpref 350, from
>> 192.168.9.2
>>                       AS path: 64665 64665 I
>>                     > to 192.168.4.1 via ge-0/1/0.0
>>                       to 192.168.4.2 via ge-0/1/0.0
>>
>> router C# show policy-options policy-statement load-balancing-policy
>> from as-path TEST-AS;
>> then {
>>     load-balance per-packet;
>> }
>>
>> router C# show policy-options as-path TEST-AS
>> "64665 .*";
>>
>> router C# show routing-options forwarding-table
>> export load-balancing-policy;
>>
>> I have even configured "multipath" at BGP but doesn't help still.
>>
>> I wonder how do I verify whether the per packet load 
>balancing is being
>> enabled other than traceroute.
>>
>> Thanks!
>>
>> Jonathan.
>>
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>>
>
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