I run a small internet routing AS (autonomous system), mostly to keep my routing skills up to date (somewhat).
AS56809 get transit from Blix Solutions AS, and it is also present on Free Internet eXchange Oslo (FIXO for short). FIXO can be compared to the somewhat bigger NIX peering point also in Oslo.
If you want to run BGP with Quagga on FIXO, here are a few hints on how to do it. This is made with quagga 0.99.14 from debs on debian wheezy. Let me add that I’m fairly inexperienced at this stuff, so there might be bad advise in this post :)
Make some access lists your networks in it, handy for filtering what routes you will be sending to peers:
conf t access-list as64496-networks permit 192.0.2.0/24 access-list as64496-networks deny deny ipv6 prefix-list ipv6-as64496-networks seq 2 permit 2001:db8::/32 ipv6 prefix-list ipv6-as64496-networks seq 10 deny any
Basic quagga/BGP setup:
conf t password <pw> ip forwarding ipv6 forwarding router bgp 64496 bgp router-id x.x.x.x network 192.0.2.0/24 address-family ipv6 network 2001:db8::/32
Make some peer groups that contain most of the boilerplate stuff:
router bgp 64496 neigh fixo-peers maximum-prefix 100 neigh fixo-peers soft-reconfiguration inbound neigh fixo-peers distribute-list as64496-networks out address-family ipv6 neighbor fixo-peers activate neighbor fixo-peers soft-reconfiguration inbound neighbor fixo-peers maximum-prefix 100 neighbor fixo-peers prefix-list ipv6-as64496-networks out
Adding a new IPv4 peering:
conf t router bgp 64496 neigh 91.198.176.x remote-as yyyy neigh 91.198.176.x peer-group fixo-peers neigh 91.198.176.x desc email@example.com, +47 1234
Adding a new IPv6 peering:
conf t router bgp 64496 neigh 2001:7f8:41:0:xxxx:1 remote-as yyyy neigh 2001:7f8:41:0:xxxx:1 desc firstname.lastname@example.org, +47 1234 address-family ipv4 unicast no neigh 2001:7f8:41:0:xxxx:1 activate address-family ipv6 neigh 2001:7f8:41:0:xxxx:1 peer-group fixo-peers
Making sure it works
After you’ve set things up, you need to verify that the peering comes up (Established state), and that you’re sending (and receiving) the routes you intend. A common mistake is to send the peer your whole routing table, which is why the distribute-list/prefix-list is in there.
Some handy commands are:
# show how this peering is doing. you want Established. show ip bgp neigh 91.198.176.xx # show what routes you are sending to this peer, should be the 1-5 routes you have in the as64496-networks access list. show ip bgp nei 91.198.176.xx advertised-routes # what you are getting from the peer. Tab-completion in vtysh is a pain on this command. show ip bgp neigh 91.198.176.xx received-routes # reset the peering. clear ip bgp neigh 91.198.176.xx
If you are running IPv6 peerings, you’ll soon notice that the CLI commands are quite incoherent.
# general overview is under the ordinary ip bgp listing: show ip bgp nei 2001:7f8:41:0:xxxx:1 # but, if you want to see advertised (and received) routes, these are here: show ipv6 bgp nei 2001:7f8:41:0:xxxx:1 advertised-routes
Fixo operates a set of route servers. This is in essence BGP routers that only contains routes, and passes leaves the next-server in announcements as they were. In essence it means that you peer with the route server and get all the routes of all the others that also peer with it. Saves you a lot of emails.
Setting up the peering is identical to any ipv4/ipv6 peering, except that you need to tag/mark the routes you want redistributed by it with a community.
route-map fixo-routeserver-out permit 10 set community 61300:61300
Quagga doesn’t allow you to set a route-map on a single member of a peer-group, so you will have to duplicate some config for these two peers.
neighbor 184.108.40.206 remote-as 61300 neighbor 220.127.116.11 description fixo-routeserver-1 neighbor 18.104.22.168 soft-reconfiguration inbound neighbor 22.214.171.124 maximum-prefix 300 neighbor 126.96.36.199 distribute-list as64496-networks out neighbor 188.8.131.52 route-map fixo-routeserver-out out