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Thread Index [isp-bgp] Re: Router for BGP4
> Date: Fri, 25 Apr 2003 16:26:48 -0700 (PDT)
> From: william
> You do not need powerfull cpu to route such a small traffic.
> You do not need more then 128Mb ram if plan is to get only one
> full route table (actually for two full tables 128mb would
> still be about twice of the minimum 64Mb necessary for 2T1s
> with BGP).
It also depends on IOS version and feature set. Plain IP 12.0
doesn't require nearly as much memory as 12.2 { IP-Plus | Service
Provider }. Disabling soft updates also helps reduce memory
needs, although at a price.
> So if you like cisco and you're going to use T1s for internet
> connectivity, you can get 3620 with NM-1FE2W (or NM-2FE for two
> ethernets) and WIC-2T card (still left is one WIC card for
> extra two T1s and one full slot for additional ethernet, T1s,
> etc) or if you prefer to buy from ebay you can get older 10Mb
> NM and WIC-1T and fill your slot completely.
>
> You can also go with 2600 serious router, newwer cisco routers
> like 2691 can have 128Mb ram and have slots for same WIC T1
> cards.
I'm rather fond of the 2691. With a max of 256 MB RAM and better
forwarding performance than the 3620, I think they're a pretty
good deal.
> If you do plan to upgrade to T3 in the future and do not want
> to buy extra router then (in my opinion since cost of router is
> going down, its better not to spend too much right now), then
Strongly agree.
> you should go with possibly 3640 or 3660 or 7204 or 7206 as
> suggested.
Unless many interfaces are required, I'd take the 2691 over the
3640. The 3660 is fairly nice, but rather large.
Also: Cisco manufactures ATM DS3 NM cards. I'm not saying this
should sway one toward the 26xx/36xx over the 72xx, but it's
something to consider... some people recycle 26xx routers into
DSL or FR terminators (FR-to-ATM provided by loop owner) when
upgrading to bigger border routers.
Eddy
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