Cisco Ex SERIES Uživatelský manuál stáhnout pdf (Strana 22)

Juniper Networks/Cisco Systems Switch Interoperability Cookbook

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1. Define loopback interface lo0 and configure an IP address for that interface. This

address will serve as the PE device’s router ID for BGP and LDP:

EX9208> configure

EX9208# set interfaces lo0 unit 0 family inet address 192.18.40.1/32

2. Define IP addresses for interfaces xe-5/0/5 (connected to the Juniper MX80 acting as a

P device) and xe-5/3/1 (connected to the Cisco Catalyst 3850 CE device):

EX9208# set interfaces xe-5/0/5 description "to Juniper MX80 P device xe-

0/0/1"

EX9208# set interfaces xe-5/0/5 unit 0 family inet address 192.18.38.1/24

EX9208# set interfaces xe-5/3/1 description "to c3850 CE device int t1/1/3"

EX9208# set interfaces xe-5/3/1 unit 0 family inet address 192.18.1.1/24

4. Configure LDP as the MPLS backbone label distribution protocol:

EX9208# set protocols ldp interface xe-5/0/5.0

5. Enable MPLS on interfaces lo0 and xe-5/0/5:

EX9208# set protocols mpls interface xe-5/0/5.0

EX9208# set protocols mpls interface lo0.0

EX9208# set interfaces xe-5/0/5 unit 0 family mpls

6. Enable OSPF on the service provider network (IS-IS also would work as an IGP):

EX9208# set protocols ospf traffic-engineering

EX9208# set protocols ospf area 0.0.0.0 interface xe-5/0/5.0

EX9208# set protocols ospf area 0.0.0.0 interface lo0.0

7. Configure MP-BGP to exchange routes with other PE devices. This example defines a

“Juniper-to-Cisco” BGP group in which the service provider network uses

autonomous system 100 (AS 100):

EX9208# set protocols /jointfilesconvert/492162/bgp group Juniper-to-Cisco type internal

EX9208# set protocols /jointfilesconvert/492162/bgp group Juniper-to-Cisco local-address 192.18.40.1

EX9208# set protocols /jointfilesconvert/492162/bgp group Juniper-to-Cisco local-as 100

EX9208# set protocols /jointfilesconvert/492162/bgp group Juniper-to-Cisco neighbor 192.18.69.1

family inet-vpn unicast

EX9208# set protocols /jointfilesconvert/492162/bgp group Juniper-to-Cisco neighbor 192.18.69.1 peer-

as 100

8. Configure a VRF instance. In this example, the VRF’s name is “VPN1”. The “route-

distinguisher” command uniquely identifies this VRF’s network. RDs prevent

traffic misrouting when multiple customers use the same network space (for example,

when two customers both use net-10 addresses):

EX9208# set routing-instances VPN1 instance-type vrf

EX9208# set routing-instances VPN1 route-distinguisher 100:2

EX9208# set routing-instances VPN1 vrf-target target:100:2

EX9208# set routing-instances VPN1 vrf-table-label

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Cisco Ex SERIES Uživatelský manuál Strana 22