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​PE-CE Routing with IS-ISv4

Picture
CSR1
router isis 100
 vrf C1
 net 49.0000.0000.0000.0100.00
 is-type level-2-only
 metric-style wide
 redistribute bgp 100
 !
 address-family ipv6
  multi-topology
 exit-address-family
!
router bgp 100
 address-family ipv4 vrf C1
  redistribute isis 100 level-2
 exit-address-family
!
interface GigabitEthernet2
 ip router isis 100
!
interface GigabitEthernet4
 ip router isis 100


CSR5
router isis 100
 vrf C1
 net 49.0000.0000.0000.0105.00
 is-type level-2-only
 metric-style wide
 redistribute bgp 100
 !
 address-family ipv6
  multi-topology
 exit-address-family
!
router bgp 100
 address-family ipv4 vrf C1
  redistribute isis 100 level-2
 exit-address-family
!
interface GigabitEthernet2
 ip router isis 100


CSR8
router isis 100
 net 49.0000.0000.0000.0108.00
 is-type level-2-only
 metric-style wide
 !
 address-family ipv6
  multi-topology
 exit-address-family
!
interface GigabitEthernet3
 ip router isis 100
!
interface Loopback101
 ip router isis 100



IOS17
router isis 100
 net 49.0000.0000.0000.0117.00
 is-type level-2-only
 metric-style wide
 !
 address-family ipv6
  multi-topology
 exit-address-family
!
interface GigabitEthernet0/0
 ip router isis 100
!
interface Loopback101
 ip router isis 100


IOS18
router isis 100
 net 49.0000.0000.0000.0118.00
 is-type level-2-only
 metric-style wide
!
interface GigabitEthernet0/0
 ip router isis 100
!
interface Loopback101
 ip router isis 100




CSR1#show isis 100 neighbors 

Tag 100:
System Id       Type Interface     IP Address      State Holdtime Circuit Id
CSR8            L2   Gi4           101.1.8.8       UP    7        CSR8.01            
IOS17           L2   Gi2           101.1.17.17     UP    8        IOS17.01           



CSR5#show isis 100 neighbors 

Tag 100:
System Id       Type Interface     IP Address      State Holdtime Circuit Id
IOS18           L2   Gi2           101.5.18.18     UP    9        IOS18.01   



CSR8#sh ip route isis  
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
i L2     10.101.17.0/24 [115/30] via 101.1.8.1, 00:09:56, GigabitEthernet3
i L2     10.101.18.0/24 [115/10] via 101.1.8.1, 00:05:32, GigabitEthernet3
      101.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
i L2     101.1.17.0/24 [115/20] via 101.1.8.1, 00:09:56, GigabitEthernet3



IOS17#sh ip route isis  
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
i L2     10.101.8.0/24 [115/30] via 101.1.17.1, 00:05:40, GigabitEthernet0/0
i L2     10.101.18.0/24 [115/10] via 101.1.17.1, 00:04:14, GigabitEthernet0/0
      101.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
i L2     101.1.8.0/24 [115/20] via 101.1.17.1, 00:05:40, GigabitEthernet0/0



IOS18#show ip route isis
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       a - application route
       + - replicated route, % - next hop override, p - overrides from PfR

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 6 subnets, 2 masks
i L2     10.101.8.0/24 [115/10] via 101.5.18.5, 01:09:30, GigabitEthernet0/0
i L2     10.101.17.0/24 [115/10] via 101.5.18.5, 01:05:12, GigabitEthernet0/0



IOS18#traceroute 10.101.8.8 source loopback 101 num
Type escape sequence to abort.
Tracing the route to 10.101.8.8
VRF info: (vrf in name/id, vrf out name/id)
  1 101.5.18.5 19 msec 6 msec 6 msec
  2 10.3.5.3 [MPLS: Labels 33/26 Exp 0] 30 msec 19 msec 30 msec
  3 101.1.8.1 [MPLS: Label 26 Exp 0] 15 msec 28 msec 11 msec
  4 101.1.8.8 45 msec *  22 msec

IOS18#traceroute 10.101.17.17 source loopback 101 num
Type escape sequence to abort.
Tracing the route to 10.101.17.17
VRF info: (vrf in name/id, vrf out name/id)
  1 101.5.18.5 15 msec 4 msec 6 msec
  2 10.3.5.3 [MPLS: Labels 33/28 Exp 0] 32 msec 34 msec 22 msec
  3 101.1.17.1 [MPLS: Label 28 Exp 0] 11 msec 12 msec 15 msec
  4 101.1.17.17 22 msec *  31 msec
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  • Home
  • Technology VoD!
    • Cisco >
      • Route & Switch / Enterprise Infrastructure
  • Technology Breakdowns!
    • Route&Switch/Ent. Infra. >
      • L2 Technologies
      • L3 Technologies
      • VPN Technologies
      • Services >
        • IOS - Dynamic NAT
        • HSRP - IPv4 Setup
        • HSRP - Priority and Preemption
    • Service Provider >
      • IGPs (Interior Gateway Protocols)
      • First Hop Redundancy >
        • HSRP (Hot Standby Router Protocol) >
          • HSRP - IOS/IOS XE Setup
          • HSRP - IOS XR Setup
      • BGP (Border Gateway Protocol)
      • Inter AS Multicast (MSDP)
      • Intra-AS MPLS
      • Inter-AS MPLS
    • Security >
      • IOS Firewall
      • ASA Firewall
      • FirePOWER Threat Defense >
        • FTD - FTD NGFW Device Setup and FMC Integration
      • VPNs >
        • PKI
        • Site to Site VPNs
        • Remote Access VPNs >
          • IOS Remote Access
          • ASA Remote Access
    • Data Center >
      • Nexus 9000v >
        • Nexus 9000v - Enabling Features
        • Nexus 9000v - VLANs and Trunks
        • Nexus 9000v - LACP Port Channels
        • Nexus 9000v - vPC (Virtual Port Channel)
        • Nexus 9000v - OSPFv2
        • Nexus 9000v - VXLAN - Ingress Replication Flood and Learn
        • Nexus 9000v - IP Multicast
        • Nexus 9000v - VxLAN - Multicast Flood and Learn
        • Nexus 9000v - VxLAN - BGP EVPN with Multicast
        • Nexus 9000v - VxLAN - BGP EVPN w/Ingress Replication
        • Nexus 9000v - VxLAN - Inter-VxLAN Routing with BGP EVPN
        • Nexus 9000v - VXLAN - External Routing
      • Nexus 7000v
    • Palo Alto