Bgp - Tag - Fryguy's Blog

IOS XR – iBGP and eBGP

Fryguy — Mon, 24 Sep 2012 12:25:02 +0000

BGP, this is where it starts to get different with IOS XR.
First up, configuring an iBGP peering with R2’s 150.1.12.2 in AS1 and advertise our loopback interface.
RP/0/7/CPU0:R1(config)#
RP/0/7/CPU0:R1(config)#router bgp 1
Let’s define the network we want to advertise, under the address family:
RP/0/7/CPU0:R1(config-bgp)#address-family ipv4 unicast
RP/0/7/CPU0:R1(config-bgp-af)#net 1.1.1.1/32
RP/0/7/CPU0:R1(config-bgp-af)#exit
Now, we can configure the neighbor. Notice all the commands for the neighbor are under the neighbor now – not next to the neighbor.
RP/0/7/CPU0:R1(config-bgp)#nei 150.1.12.2
RP/0/7/CPU0:R1(config-bgp-nbr)#remote-as 1
RP/0/7/CPU0:R1(config-bgp-nbr)#address-family ipv4 unicast
RP/0/7/CPU0:R1(config-bgp-nbr-af)#exit
RP/0/7/CPU0:R1(config-bgp-nbr)#comm
Thu Mar 29 22:47:05.147 UTC
RP/0/7/CPU0:R1(config-bgp)#exit
RP/0/7/CPU0:R1(config)#exit
Now, time to see if we have a neighbor established:
RP/0/7/CPU0:R1#sh bgp nei 150.1.12.2
Thu Mar 29 22:48:13.338 UTC

Basic MPLS continued – RIP

Fryguy — Mon, 12 Sep 2011 12:05:42 +0000

The other day I posted some “basic” MPLS information and figured I could use that to build a bit more. In subsequent posts I will post the configs for EIGRP, OSPF, and BGP – but today I will post on RIP.
So, this whole lab/post will build off the previous one – LINK – but will remove all the static routes and replace them with the RIP protocol. I will only post the configs for the CE (R1, R3, R4, R5) and PE (R2 and R5), the core will not change.

DMVPN and Routing Protocols – BGP

Fryguy — Sat, 06 Aug 2011 21:52:31 +0000

This post will build off my last one, DMVPN, and here we will discuss the routing protocol options as well as each of their configurations. I will break out each protocol into a separate post in order to help keep things straight, putting them all together has the potential to get confusing (for both you and me!). The routing protocol options I will document are OSPF, RIPv2, EIGRP, and BGP and each has some unique features and quirks, so I will try and point them out where necessary. The only problem that BGP introduces here is that it is a bit higher-touch for routing. You will need to configure the spoke as well as the HUB to support the new neighbor relationship. This might not be a big deal, but if you have quite a few of these sites, this means every add will require you to modify the hub router. Guess we could call it job security 🙂 Quick note: When I am posting the configurations for the sites I will only notate the routing protocol additions. If you need information on DMVPN configuration, see my previous post. Router/Switch Output Commands Notes Lets start with the DMVPN hub. First, lets get that loopoback created so we have something to advertise. Rack1DMVPN(config)#interface Loopback0 Rack1DMVPN(config-if)# ip address 100.100.100.100 255.255.255.255