Need to setup BGP to peer and announce IPs and route them - help!
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I'm pulling full routes from two providers on a box with 8GB. It's only showing 10% memory usage. I'm sure there are plenty of others getting full routes on pfSense/OpenBGPd.
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I am just curious in what scenario do you need to pull the full routing table?? Are you a peer for multiple backbone networks?
If your just an end user with some networks on your side, pretty much don't all 600 some thousand routes all point to your isp gateway anyway ;)
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I am just curious in what scenario do you need to pull the full routing table?? Are you a peer for multiple backbone networks?
That's how BGP works- you compare the routing tables and see which provider has the best path. If you were not multi-homed, you could just use a default route, but then you wouldn't need BGP anyway.
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No you would still need BGP if you wanted to announce and advertise the networks that are behind your transit. Advertising you have say 1.2.3.0/24 has nothing to do with holding the internet full routing table..
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If you are single homed, why wouldn't you just have the provider announce the block for you?
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You could do that… But what if you have multiple connections with different providers and announce part of your networks out of connection A, while others out of B and if A goes down you announce your networks out of the other location, etc.
My point was this poster does not seem like they are a internet peer with multiple connections and routes - there is NO point to trying to hold a copy of the internet routing table in such a setup. We run bgp and I can tell you for freaking sure we don't hold the internet routes on those routers - its completely pointless to do such a thing unless you peer with multiple backbones and have a use.
Most companies would be edge users and even when they have multiple providers into their location for failover, backup, load you would have no freaking use to hold the whole internet routing table on any of your devices be it a pfsense box or actual router, etc.
Now it can be interesting to look at ;) But holding the routing table for the whole freaking planet has really little to do with running bgp to advertise your routes..
As to your ISP announcing it for you.. You might do that if you have say 1 network or so. But we have a /16 and we adv different parts of it out of different location with different providers. etc..
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This has gone totally off the rails in regards to the question asked. Some people need or want the full table. It is possible on pfSense/OpenBGPd. Not going to go on about particular use cases. Was just trying to share some data on memory usage. I'll use BGP the way I think it best suits my environment, and you can use it how it suits yours. Peace out.
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Just to update everyone, I ended up setting this up and everything has been working great. I am accepting the full Internet routes (633,410) and my system is using 0% CPU and 2% of 98 GB RAM.
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good to know.
how to you activate the full routing table? how do you see it?
in show routes I see only 20 entries i do not see the 6400000 entries.thanks for sharing
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You set up the peering with the provider(s). They will send you routes based on their configuration. You should talk your provider. If you aren't multi-homed, you can just get a default route from them.
