From: Pickell, Aaryn (Aaryn.Pickell@xxxxxxxxxxxxx)
Date: Wed May 23 2001 - 16:27:27 GMT-3
I think you can increase the number of equal cost paths it will hold.
Border(config-router)#maximum-paths ?
<1-6> Number of paths
Aaryn Pickell - CCNP ATM, CCDP, MCSE
Senior Engineer - Routing Protocols
Getronics Inc.
Direct: 713-394-1609
Email:aaryn.pickell@getronics.com
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> -----Original Message-----
> From: Chuck Larrieu [mailto:chuck@cl.cncdsl.com]
> Sent: Wednesday, May 23, 2001 2:06 PM
> To: Shane Miles; ccielab@groupstudy.com
> Subject: RE: OSPF unequal cost load balancing
>
>
> Follow up, quoted from RFC 2328:
>
> "The OSPF protocol maintains multiple equal-cost routes to
> all destinations.
> This can be seen in the steps used above to calculate the
> routing table, and
> in the definition of the routing table structure.
>
> " Each one of the multiple routes will be of the same type
> (intra-area,
> inter-area, type 1 external or type 2 external), cost, and
> will have the
> same associated area. However, each route may specify a
> separate next hop
> and Advertising router.
>
> "There is no requirement that a router running OSPF keep track of all
> possible equal-cost routes to a destination. An
> implementation may choose to
> keep only a fixed number of routes to any given destination.
> This does not
> affect any of the algorithms presented in this specification. "
>
> So Cisco appears to have decided that 4 is the magic number.
> There may be
> practical reasons for this, but according to the RFC, there
> could be more or
> fewer equal cost paths supported.
>
> But no, OSPF does not support unequal cost paths, which would
> defeat the
> purpose of the algorithm in the first place.
>
> HTH
>
> Chuck
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> Behalf Of
> Shane Miles
> Sent: Wednesday, May 23, 2001 11:25 AM
> To: 'ccielab@groupstudy.com'
> Subject: OSPF unequal cost load balancing
>
> My understanding is that when using OSPF you can have up to 4
> equal-cost paths performing load balancing. Is it at all
> possible to do
> unequal cost load balancing with OSPF as is possible with EIGRP?
>
> --
> Shane P. Miles
> **Please read:http://www.groupstudy.com/list/posting.html
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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