IPv4 BGP Configuration


router bgp 64777
	bgp router-id 1.1.1.1
	neighbor 198.51.100.13 remote-as 65500
	
	neighbor 10.5.9.2 remote-as 64777 next-hop-self
	network 201.0.113.0 mask 255.255.255.128
	
show ip bgp summary
show ip bgp
show ip route
show ip bgp neighbour 198.51.100.9 advertised-routes

⚠️

Network command needs to match exactly

ip route 203.0.133.0 255.255.255.0 null 0

Redistributing and Summarization


ip access-list extended BGP_FILTER 
	permit ip 203.0.113.0 0.0.0.255 any
route-map FILTER_OSPF
	match ip address BGP_FILTER
	
router bgp 64777
	redistribute ospf 1 route-map FILTER_OSPF
	
ip access-list extended BGP_TO_OSPF
	permit ip 1.0.0.0 0.255.255.255 any
route-map BGP_TO_OSPF
	match ip address BGP_TO_OSPF

router ospf 1
	redistribute bgp 64777 subnets route-map BGP_TO_OSPF metric 50
	
	
router bgp 64777
	aggregate-address 203.0.113.0 255.255.255.0 summary-only

IPv4 Mutliprotocol BGP Configuration

IOS Configuration


router bgp 6509
	neighbor 10.1.11.1 remote-as 5505
	address-family ipv4 unicast 
		network 172.16.1.0 mask 255.255.255.0
		neighbor 10.1.11.1 activate

IOS-XR Configuration


router bgp 5505
	address-family ipv4 unicast 
		network 172.16.10.0/24
	neighbor 10.1.11.2
		remote-as 6509
		address-family ipv4 unicast
			route-policy PASS in
			route-policy PASS out
		
route-policy PASS
	pass
	
commit