[LARTC] Best setup for redundant routers.

[Mohan Sundaram]

Grant Taylor wrote:
> This looks to be a general routing related question rather than a "Linux 
> Advanced Routing and Traffic Control" (a.k.a. LARTC) question and thus 
> may be better answered elsewhere.
*nod*
> 
> On 12/06/07 10:43, Shane McKinley wrote:
>> I am setting up 2 Vyatta routers that will serve as redundant 
>> failover core routers out to the backbone of our ISP. They will be 
>> serving for routing between other branches and the ISP and bandwidth 
>> management.
Would be interesting to know how they perform.
> Yes, an interior routing protocol would be good.  Based on my limited 
> experience I would recommend that you use either (preferably) OSPF or 
> possibly Interior BGP (a.k.a. IBGP).
Either is good. For just 2 routers, most dynamic protocols work well. 
Older protocols failed in scaling to larger networks. AFAIR, OSPF 
support discovered route cost propogation which is useful in route 
selection/ load balancing/ECMP etc. Do not remember if IBGP does it. Has 
been a while and so a little rusty on finer details.
> You could look at things like RIP or ISIS, but neither of them will be 
> as good or bandwidth friendly as either OSPF or IBGP.
For just 2 routers, the decision is pretty simple - any. I'd go with 
OSPF or IBGP depending on comfort, skillset and support at locations needed.

Mohan