This post demonstrates how to configure OSPF and redistribute
connected and static routes into OSPF on Cisco, Juniper and Nokia
(Alcatel-Lucent) routers
Cisco Configuration:
interface
GigabitEthernet3/2/0
description ***Connected
to Juniper***
ip address 172.31.22.22 255.255.255.252
load-interval 30
negotiation auto
mpls
ip
end
router ospf 100
router-id 100.64.0.5
redistribute static
subnets
redistribute
connected subnets
network
172.31.22.20 0.0.0.3 area 0
Verification:
Cisco-RTR
#sh ip ospf
neighbor
Neighbor ID Pri State Dead Time Address Interface
100.64.0.3 0
FULL/ - 00:00:32 172.31.22.21 GigabitEthernet3/2/0
Configuration on Juniper:
Interface configuration:
set
interfaces ge-3/2/1 unit 0 family inet address
172.31.22.21/30
OSPF Configuration:
set protocols
ospf export Redistribute-static-direct
set protocols
ospf area 0 interface ge-3/2/1.0
juniper-rtr> show configuration policy-options
policy-statement Redistribute-static-direct
term 1 {
from {
protocol
direct;
}
then accept;
}
term 2 {
from {
protocol static;
}
then accept;
}
Verification:
Juniper-rtr > show ospf neighbor
Address Interface State ID Pri
Dead
172.31.22.22 ge-3/2/1.0 Full 100.64.0.5 1
36
Configuration on Alcatel SR routers:
Interface Configuration :
ALU-RTR # configure router interface
"GE_2/2/17"
ALU-RTR >config>router>if# address 172.31.23.89/30
ALU-RTR >config>router>if#port 2/2/17:0
ALU-RTR >config>router>if#no
shutdown
Policy configuration to advertise connected and
static routes:
ALU-RTR#
configure router policy-options
ALU-RTR>config>router>policy-options# begin
*ALU-RTR>config>router>policy-options# policy-statement
EXPORT_OSPF
*ALU-RTR>config>router>policy-options>policy-statement$
entry 10
*ALU-RTR>config>router>policy-options>policy-statement>entry$
from protocol direct
*ALU-RTR>config>router>policy-options>policy-statement>entry$
action accept
*ALU-RTR>config>router>policy-options>policy-statement>entry>action$
exit
*ALU-RTR>config>router>policy-options>policy-statement>entry$
exit
*ALU-RTR>config>router>policy-options>policy-statement$
entry 20
*ALU-RTR>config>router>policy-options>policy-statement>entry$
from protocol static
*ALU-RTR>config>router>policy-options>policy-statement>entry$
action accept
*ALU-RTR>config>router>policy-options>policy-statement>entry>action$
exit
*ALU-RTR>config>router>policy-options>policy-statement>entry$
exit
*ALU-RTR>config>router>policy-options>policy-statement$
default-action reject
*ALU-RTR>config>router>policy-options>policy-statement$
exit
*ALU-RTR>config>router>policy-options# commit
OSPF Configuration:
ALU-RTR# configure
router ospf
ALU-RTR
>config>router>ospf#
export
"EXPORT_OSPF"
ALU-RTR
>config>router>ospf# area 0.0.0.0
ALU-RTR
>
config>router>ospf>area#
interface "TOCISCO"
ALU-RTR
>
config>router>ospf>area>if$no shutdown
Verification:
ALU-RTR# show
router ospf neighbor
===============================================================================
OSPFv2 (0)
all neighbors
===============================================================================
Interface-Name Rtr
Id State Pri RetxQ TTL
Area-Id
-------------------------------------------------------------------------------
GE_2/2/17 100.64.0.23 Full
1 0 36
0.0.0.0
-------------------------------------------------------------------------------
No. of Neighbors: 1
===============================================================================
ALU-RTR#
