I've got a router on Mae West with an open peering policy that has close to 70 peers. I'm currently running gated on a P133 box and have just increased the size of data structures as the number of peers grew. We are looking at going to a Cisco 7200 (with NPE200) or 7500 (with RSP4), but I haven't been able to determine weather these routers will handle this many peers and still have room for expansion. I've heard that Cisco IOS has a software limit, even if the RSPs can handle it, but I haven't been able to tell what it was. Are there routers from other vendors out there handling large numbers of peers? Our bandwidth is too low to want to consider putting a second router on the NAP. I've considered providing ebgp multihop peering to other routers behind this one, but I haven't heard of others doing this sort of thing on the NAP's before. Of course, there are the route servers, but I'm more interested in offering direct peering to anyone that wants it. I only have full routing tables coming in at 2 places in my network and might anticipate having 8 - 10 IBGP peer sessions in addition to external sessions. Rob
I've got a router on Mae West with an open peering policy that has close to 70 peers.
1. Consider using RA for less important peers. This saves you EBGP sessions. 2. I'm running a 7507 at MAE-East with a similar number of peers which is as stable as MAE-East allows it to be. -- Alex Bligh GX Networks (formerly Xara Networks)
Alex Bligh wrote:
I've got a router on Mae West with an open peering policy that has close to 70 peers.
Sorry, we are not at MAE(E/W) right now. What effect does running 70 peers on a 4700 give, is ita memory or just a not enough UMPH problem?
1. Consider using RA for less important peers. This saves you EBGP sessions. 2. I'm running a 7507 at MAE-East with a similar number of peers which is as stable as MAE-East allows it to be.
-- Leigh Porter
It's not running on a 4700 right now. It is a Pentium 133 with 96mb of memory running gated. Actually, it runs just fine. The box is barely loade and we have no problems with it at all. In message <348FA5C8.AC9C8774@wisper.net>, Leigh Porter writes:
Alex Bligh wrote:
I've got a router on Mae West with an open peering policy that has close to 70 peers.
Sorry, we are not at MAE(E/W) right now. What effect does running 70 peers on a 4700 give, is ita memory or just a not enough UMPH problem?
1. Consider using RA for less important peers. This saves you EBGP sessions . 2. I'm running a 7507 at MAE-East with a similar number of peers which is as stable as MAE-East allows it to be.
-- Leigh Porter
The hard limit for BGP peers is currently 200 on 11.X IOS. A 7513 with and RSP4 will be able to handle that kind of load without a problem and still have plenly of room for expanison. The only 'HARD LIMIT' issue you may run into is if you have inbound access-lists on these session, not including as-path access-lists, it does require quite a bit of interupt driven CPU usage and you will have a fairly high average. The only problem with this is that you do not have much processor left for system processes. This will however hold just five if you use VIP2 based cards and enable distributed switching. My suggestion is that you get a VIP2-40 with 2 PA's, one FastEthernet, and one (Hssi, depending on what layer II type of connection you have). - Aaron Hughes - UltraNet Communications, Inc. - aaronh@ultra.net. On Wed, 10 Dec 1997, Rob Liebschutz wrote:
I've got a router on Mae West with an open peering policy that has close to 70 peers. I'm currently running gated on a P133 box and have just increased the size of data structures as the number of peers grew. We are looking at going to a Cisco 7200 (with NPE200) or 7500 (with RSP4), but I haven't been able to determine weather these routers will handle this many peers and still have room for expansion. I've heard that Cisco IOS has a software limit, even if the RSPs can handle it, but I haven't been able to tell what it was. Are there routers from other vendors out there handling large numbers of peers?
Our bandwidth is too low to want to consider putting a second router on the NAP. I've considered providing ebgp multihop peering to other routers behind this one, but I haven't heard of others doing this sort of thing on the NAP's before. Of course, there are the route servers, but I'm more interested in offering direct peering to anyone that wants it.
I only have full routing tables coming in at 2 places in my network and might anticipate having 8 - 10 IBGP peer sessions in addition to external sessions.
Rob
participants (5)
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Aaron Hughes -
Alex Bligh -
Leigh Porter -
Rob Liebschutz -
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