ArubaOS-CX software has highly scalable architecture and it can cover wide range of products from edge switch model (e.g. 6200) to DC core switch model (e.g. 8400). Consequently, the virtual version of AOS-CX also covers wide range of switch functions from edge authentication to BGP/EVPN for datacenter core. This time I build a basic core network running multiple dynamic routing protocols, OSPF and BGP.
We use this topology. All ports are routed ports.
Let’s configure BGP network first.
BGP-CORE config snippet
hostname BGP-CORE
interface 1/1/1
no shutdown
ip address 172.16.0.1/30
interface 1/1/2
no shutdown
ip address 172.16.0.5/30
interface loopback 0
ip address 172.31.0.1/32
router bgp 65000
neighbor 172.16.0.2 remote-as 65001
neighbor 172.16.0.6 remote-as 65001
address-family ipv4 unicast
neighbor 172.16.0.2 activate
neighbor 172.16.0.6 activate
network 172.16.0.0/30
network 172.16.0.4/30
network 172.31.0.1/32ASBR-1 config snippet
hostname ASBR-1
interface 1/1/1
no shutdown
ip address 172.16.0.2/30
interface 1/1/2
no shutdown
ip address 10.0.1.1/30
interface 1/1/3
no shutdown
ip address 10.0.1.5/30
interface 1/1/4
no shutdown
ip address 10.0.1.9/30
interface loopback 0
ip address 1.1.1.1/32
router bgp 65001
neighbor 10.0.1.2 remote-as 65001
neighbor 172.16.0.1 remote-as 65000
address-family ipv4 unicast
neighbor 10.0.1.2 activate
neighbor 172.16.0.1 activate
network 10.0.1.0/30
network 172.16.0.0/30
redistribute ospfASBR-2 config snippet
hostname ASBR-2
interface 1/1/1
no shutdown
ip address 172.16.0.6/30
interface 1/1/2
no shutdown
ip address 10.0.1.2/30
interface 1/1/3
no shutdown
ip address 10.0.1.13/30
interface 1/1/4
no shutdown
ip address 10.0.1.17/30
interface loopback 0
ip address 1.1.1.2/32
router bgp 65001
neighbor 10.0.1.1 remote-as 65001
neighbor 172.16.0.5 remote-as 65000
address-family ipv4 unicast
neighbor 10.0.1.1 activate
neighbor 172.16.0.5 activate
network 10.0.1.0/30
network 172.16.0.4/30
redistribute ospfThen check the BGP status.
BGP-CORE# show bgp ipv4 unicast summary
VRF : default
BGP Summary
-----------
Local AS : 65000 BGP Router Identifier : 172.31.0.1
Peers : 2 Log Neighbor Changes : No
Cfg. Hold Time : 180 Cfg. Keep Alive : 60
Neighbor Remote-AS MsgRcvd MsgSent Up/Down Time State AdminStatus
172.16.0.2 65001 37 38 00h:25m:04s Established Up
172.16.0.6 65001 29 28 00h:19m:14s Established Up
BGP-CORE# show bgp ipv4 unicast
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, e external S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
VRF : default
Local Router-ID 172.31.0.1
Network Nexthop Metric LocPrf Weight Path
*>e 10.0.1.0/30 172.16.0.2 0 100 0 65001 i
*=e 10.0.1.0/30 172.16.0.6 0 100 0 65001 i
*> 172.16.0.0/30 0.0.0.0 0 100 0 i
* e 172.16.0.0/30 172.16.0.2 0 100 0 65001 i
* e 172.16.0.0/30 172.16.0.6 0 100 0 65001 i
*> 172.16.0.4/30 0.0.0.0 0 100 0 i
* e 172.16.0.4/30 172.16.0.2 0 100 0 65001 i
* e 172.16.0.4/30 172.16.0.6 0 100 0 65001 i
*> 172.31.0.1/32 0.0.0.0 0 100 0 i
Total number of entries 9It looks good. Confirm ping works.
BGP-CORE# ping 10.0.1.1
PING 10.0.1.1 (10.0.1.1) 100(128) bytes of data.
108 bytes from 10.0.1.1: icmp_seq=1 ttl=63 time=6.70 ms
108 bytes from 10.0.1.1: icmp_seq=2 ttl=63 time=3.90 ms
BGP-CORE# ping 10.0.1.2
PING 10.0.1.2 (10.0.1.2) 100(128) bytes of data.
108 bytes from 10.0.1.2: icmp_seq=1 ttl=64 time=2.56 ms
108 bytes from 10.0.1.2: icmp_seq=2 ttl=64 time=3.03 msConfigure OSPF network
Let’s proceed to OSPF.
ASBR-1 OSPF config snippet
router ospf 1
router-id 1.1.1.1
redistribute bgp
area 0
interface loopback 0
ip ospf 1 area 0
interface 1/1/2
ip ospf 1 area 0
ip ospf network point-to-point
interface 1/1/3
ip ospf 1 area 0
ip ospf network point-to-point
interface 1/1/4
ip ospf 1 area 0
ip ospf network point-to-pointASBR-2 OSPF config snippet
router ospf 1
router-id 1.1.1.2
redistribute bgp
area 0
interface loopback 0
ip ospf 1 area 0
interface 1/1/2
ip ospf 1 area 0
ip ospf network point-to-point
interface 1/1/3
ip ospf 1 area 0
ip ospf network point-to-point
interface 1/1/4
ip ospf 1 area 0
ip ospf network point-to-pointOSPF-1 config snippet
hostname OSPF-1
router ospf 1
router-id 1.1.2.1
area 0
interface loopback 0
ip address 1.1.2.1/32
ip ospf 1 area 0
interface 1/1/1
no shutdown
ip address 10.0.1.6/30
ip ospf 1 area 0
ip ospf network point-to-point
interface 1/1/2
no shutdown
ip address 10.0.1.14/30
ip ospf 1 area 0
ip ospf network point-to-pointOSPF-2 config snippet
hostname OSPF-2
router ospf 1
router-id 1.1.2.2
area 0
interface loopback 0
ip address 1.1.2.2/32
ip ospf 1 area 0
interface 1/1/1
no shutdown
ip address 10.0.1.10/30
ip ospf 1 area 0
ip ospf network point-to-point
interface 1/1/2
no shutdown
ip address 10.0.1.18/30
ip ospf 1 area 0
ip ospf network point-to-pointOnce done, confirm every IP address is reachable. Also you should check routing table, OSPF/BGP status, etc.
OSPF-2# ping 172.31.0.1
PING 172.31.0.1 (172.31.0.1) 100(128) bytes of data.
108 bytes from 172.31.0.1: icmp_seq=1 ttl=62 time=3.90 ms
108 bytes from 172.31.0.1: icmp_seq=2 ttl=62 time=3.65 ms
OSPF-2# ping 172.16.0.2
PING 172.16.0.2 (172.16.0.2) 100(128) bytes of data.
108 bytes from 172.16.0.2: icmp_seq=1 ttl=64 time=3.83 ms
108 bytes from 172.16.0.2: icmp_seq=2 ttl=64 time=2.28 ms
OSPF-2# show ip ospf routes
Codes: i - Intra-area route, I - Inter-area route
E1 - External type-1, E2 - External type-2
OSPF Process ID 1 VRF default, Routing Table
---------------------------------------------
Total Number of Routes : 16
1.1.1.1/32 (i) area: 0.0.0.0
via 10.0.1.9 interface 1/1/1, cost 100 distance 110
1.1.1.2/32 (i) area: 0.0.0.0
via 10.0.1.17 interface 1/1/2, cost 100 distance 110
1.1.2.1/32 (i) area: 0.0.0.0
via 10.0.1.9 interface 1/1/1, cost 200 distance 110
1.1.2.1/32 (i) area: 0.0.0.0
via 10.0.1.17 interface 1/1/2, cost 200 distance 110
10.0.1.0/30 (i) area: 0.0.0.0
via 10.0.1.9 interface 1/1/1, cost 200 distance 110
10.0.1.0/30 (i) area: 0.0.0.0
via 10.0.1.17 interface 1/1/2, cost 200 distance 110
10.0.1.4/30 (i) area: 0.0.0.0
via 10.0.1.9 interface 1/1/1, cost 200 distance 110
10.0.1.8/30 (i) area: 0.0.0.0
directly attached to interface 1/1/1, cost 100 distance 110
10.0.1.12/30 (i) area: 0.0.0.0
via 10.0.1.17 interface 1/1/2, cost 200 distance 110
10.0.1.16/30 (i) area: 0.0.0.0
directly attached to interface 1/1/2, cost 100 distance 110
172.16.0.0/30 (E2)
via 10.0.1.9 interface 1/1/1, cost 25 distance 110
172.16.0.0/30 (E2)
via 10.0.1.17 interface 1/1/2, cost 25 distance 110
172.16.0.4/30 (E2)
via 10.0.1.9 interface 1/1/1, cost 25 distance 110
172.16.0.4/30 (E2)
via 10.0.1.17 interface 1/1/2, cost 25 distance 110
172.31.0.1/32 (E2)
via 10.0.1.9 interface 1/1/1, cost 25 distance 110
172.31.0.1/32 (E2)
via 10.0.1.17 interface 1/1/2, cost 25 distance 110