|
Home > Archive > CCNP > October 2001 > Bgp
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
|
|
| Stickman 2001-09-26, 12:11 pm |
| What is minium Cisco hardware requirements to implement BGP....Is it a 3000 series router,4000, 7000,etc... | |
| strikeattack 2001-09-26, 12:13 pm |
| I know you can do it on a 2600 series router, and I would suspect you would be able to do it on all higher models. | |
| Stickman 2001-09-26, 1:28 pm |
| thanks | |
| darthfeces 2001-09-26, 8:52 pm |
| i have run bgp on 2500's | |
| doctorcisco 2001-09-27, 12:22 pm |
| quote:
Originally posted by Stickman
What is minium Cisco hardware requirements to implement BGP....Is it a 3000 series router,4000, 7000,etc...
Depends ... if you want the complete internet routing table, I wouldn't go below a 3640 with 128 megs of RAM. If you're taking a subset of the routes from your ISP (just their customers, for example), and use default routing for everything else, a 2600 would probably be OK.
The first question to ask is, "Do I really need to run BGP with my ISP?" The answer may very well be, "No." Unless you have two pretty sizable pipes to two different ISP's at the same location in your network, default routing may well be a simpler and cheaper option.
If you just want to run BGP in the lab, anything will do.
HTH,
doctorcisco | |
| Retired-Mod 2001-09-28, 4:57 pm |
| As the always informative Doctor asks "Why would you want any Internet routes?" Of course you want none and you'll just send all unknown traffic to them, but you may well want to advertise your public servers to them (and the world) so you may need a peering relationship with them. C&W has been on a mission to gain revenue and has been de-peering large sites like NASA because they weren't being paid. This has been on and off and at this time they are working out some sort of agreement, but it makes the point that you do need the route advertisements.
Nah, I ain't associated with NASA, just aware of the issues.
Yankee
PS. The model of the router will always depend on the amount of traffic. | |
| depamo 2001-09-29, 1:20 pm |
| To merely implement BGP peering, all you need is an IOS that handles BGP. This is a feature in excess of standard feature sets that you would normally find on a router. Heck, I had a small cheap lab with a 2501 and two 3102 routers that were eBGP peering to each other over simulated Frame-Relay connections.
As for the internet, I have done it with low traffic on a 2610 with an uplink of 588Kb/s. The router had 64Meg of RAM on it and was connected to about 60 users. The network was temporary but I never ran out of memory and had all the summarized routes in the router for the internet.
As for the internet, lack of peering with the BGP hosting router will stop all incomming traffic to your network. Unless the your far side is putting in static routes through their network (never see this) everything depends on your router peering with the BGP peer on the other side and pushing your routes into that network. This will continue to move up the routing tables until your ISP is announcing that it has a path to your network to the entire internet.
One thing that I did note was when I used a 2501 to peer in about the same situation, some of the routes didn't fit in the memory and there were some intermittent problems but it still worked for the most part. Under the circumstances at the time, there was no choice and it was a temporary solution until I got the other router back in place. The thing to remeber here, if the router doesn't have an entry in the really huge BGP internet routing table, you will just get an ICMP Dest unreachable.
I would recommend that you do use a 3600 series router with at least 64Meg on it if you are hosting only upto 100 users. Anything over and running any complex QoS features, compression, queuing, or a second routing protocol, you should bump up to 128Meg at least. | |
|
| I realise this posts a couple of weeks old but I have been meaning to have a look and have only just got round to it.
I have a couple of 1600's lying around at work and these have BGP on them, although they only have 8Megs of DRAM so they probably won't be able too do much, though I reckon it'll be OK for lab's.
I'm not sure what feature set is installed (C1600-OY-M, 12.03T), the closest I can find on the web site is C1600-OY-MZ, which is IP/FW.
Off post slightly, but does anybody think that the new Cisco search engine with Google is any good? It took me ages to find the feature set info out, personally I feel that the way it was before was better - although it did give loads of trash - It's probably me!! All the searches I've done since have been OK... |
|
|
|
|