[c-nsp] small (tiny?) route reflector for MPLS L3VPN network

[Pete Lumbis]

I don't see any reason why not, as long as you have enough memory to
spare for future growth. The one thing you might want to keep in mind
is the reconvergence time after a RR reload since you'll be looking at
a smaller CPU.

On Fri, Jan 7, 2011 at 10:28 AM, Phil Mayers <p.mayers at imperial.ac.uk> wrote:
> We run a network of 6500s and Juniper J4350s with OSPF IGP and iBGP
> including vpnv4 (with mdt address family) and vpnv6.
>
> Two of the "central" 6500s have served as the route reflectors for a while
> now without problem, however there is a question over whether we could
> usefully deploy a pair of dedicated boxes. For one thing it would mean we
> could reboot traffic-forwarding devices without affecting BGP sessions, for
> another we could get onto a "newer" IOS with features like BGP "selective
> address tracking" to kill BGP sessions on IGP flaps.
>
> We have a pretty small routing table:
>
> #sh ip route summary
> IP routing table name is Default-IP-Routing-Table(0)
> IP routing table maximum-paths is 32
> Route Source    Networks    Subnets     Overhead    Memory (bytes)
> connected       1           20          1580        3024
> static          16          14          2232        12496
> ospf 1          2           66          5328        9792
>  Intra-area: 54 Inter-area: 0 External-1: 0 External-2: 14
>  NSSA External-1: 0 NSSA External-2: 0
> bgp 64580       11          923         67320       134496
>  External: 17 Internal: 917 Local: 0
> internal        25                                  54700
> Total           55          1023        76460       214508
> Removing Queue Size 0
>
> ...although each VRF contains the whole table, so it's actually 10x that.
>
> I think a 2900 (or even a 1900) with advanced IP services will more than
> suffice for this. Any comments?
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