OSPF and Multiple Areas

j2sw · October 2, 2009, 7:40pm

All,
I have some OSPF routing issues I am trying to work out.

Below is the general concept of what is going on.

R1 is generating the default route. As long as the connection between R1 and R4 is alive things are happy. If this connection breaks we experience one of the following issues:

1.Default route is not propagated into area2.
2.If we add a secondary static route traffic leaves the area but runs into routing issues.

I am looking for some config examples in this sort of setup. R2, R3, & R4 are all ABR’s correct in this case? What should their config look like?

Right now the IP space between R1 and Routers 2,3,&4 is all in the backbone area. The rest of the IP space on 2,3,4 are all on area2. The links between the routers are all Point-To-Point.

Any advice on how to clean this up or config examples would be much appreciated.

mrz · October 5, 2009, 6:40am

Post your current OSPF config from R2,R3 and R4

j2sw · October 5, 2009, 2:47pm

R4. Some stuff XX’ed out for security purposes.

 /routing ospf 
/routing ospf> print
               router-id: 0.0.0.0
      distribute-default: never
  redistribute-connected: as-type-1
     redistribute-static: as-type-2
        redistribute-rip: no
        redistribute-bgp: no
          metric-default: 1
        metric-connected: 20
           metric-static: 20
              metric-rip: 20
              metric-bgp: 20
            mpls-te-area: unspecified
       mpls-te-router-id: unspecified
 /routing ospf> export
/routing ospf area
add area-id=0.0.0.0 authentication=none disabled=no name=backbone type=\
    default
add area-id=192.168.57.0 authentication=md5 disabled=no name=HAMCOUNTY type=\
    default
/routing ospf
set distribute-default=never metric-bgp=20 metric-connected=20 \
    metric-default=1 metric-rip=20 metric-static=20 mpls-te-area=unspecified \
    mpls-te-router-id=unspecified redistribute-bgp=no redistribute-connected=\
    as-type-1 redistribute-rip=no redistribute-static=as-type-2 router-id=\
    0.0.0.0
/routing ospf interface
add authentication=md5 authentication-key=XXXXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    "1- Anderson" network-type=point-to-point passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    "5- Arcadia" network-type=point-to-point passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    "3- 58 Network" network-type=nbma passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    "7- 57 Network" network-type=nbma passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    "2- Hortonville" network-type=point-to-point passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    9-Windfall network-type=point-to-point passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    "4- Kempton" network-type=point-to-point passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
/routing ospf network
add area=backbone disabled=no network=192.168.XX.XX/29
add area=HAMCOUNTY disabled=no network=192.168.YY.YY/24
add area=HAMCOUNTY disabled=no network=192.168.AA.AA/29
add area=HAMCOUNTY disabled=no network=192.168.BB.BB/29
add area=HAMCOUNTY disabled=no network=192.168.CC.CC/24
add area=HAMCOUNTY disabled=no network=192.168.DD.DD/29
add area=HAMCOUNTY disabled=no network=192.168.EE.EE/24
add area=HAMCOUNTY disabled=no network=192.168.FF.FF/24
add area=HAMCOUNTY disabled=no network=10.10.GG.GG/29
add area=HAMCOUNTY disabled=no network=192.168.HH.HH/29

j2sw · October 5, 2009, 2:51pm

R2

/routing ospf 
/routing ospf> print
               router-id: 0.0.0.0
      distribute-default: never
  redistribute-connected: as-type-1
     redistribute-static: as-type-2
        redistribute-rip: no
        redistribute-bgp: no
          metric-default: 1
        metric-connected: 20
           metric-static: 20
              metric-rip: 20
              metric-bgp: 20
            mpls-te-area: unspecified
       mpls-te-router-id: unspecified

/routing ospf area
add area-id=0.0.0.0 authentication=none disabled=no name=backbone type=\
    default
add area-id=192.168.57.0 authentication=md5 disabled=no name=HAMCOUNTY type=\
    default
/routing ospf
set distribute-default=never metric-bgp=20 metric-connected=20 \
    metric-default=1 metric-rip=20 metric-static=20 mpls-te-area=unspecified \
    mpls-te-router-id=unspecified redistribute-bgp=no redistribute-connected=\
    as-type-1 redistribute-rip=no redistribute-static=as-type-2 router-id=\
    0.0.0.0
/routing ospf interface
add authentication=md5 authentication-key=XXXX authentication-key-id=1 \
    cost=30 dead-interval=40s disabled=no hello-interval=10s interface=\
    "1- BH to Sheridan" network-type=point-to-point passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    "5- crossover" network-type=broadcast passive=yes priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXXX authentication-key-id=1 \
    cost=10 dead-interval=40s disabled=no hello-interval=10s interface=\
    "2- BH Hamilton County" network-type=point-to-point passive=no priority=1 \
    retransmit-interval=5s transmit-delay=1s
add authentication=md5 authentication-key=XXXXX authentication-key-id=1 \
    cost=100 dead-interval=40s disabled=no hello-interval=10s interface=\
    "3- BH Noblesville" network-type=point-to-point passive=yes priority=1 \
    retransmit-interval=5s transmit-delay=1s
/routing ospf network
add area=HAMCOUNTY disabled=yes network=0.0.0.0/0
add area=HAMCOUNTY disabled=no network=192.168.AA.AA/29
add area=backbone disabled=no network=192.168.BB.BB/29
add area=HAMCOUNTY disabled=no network=192.168.CC.CC/30
add area=HAMCOUNTY disabled=no network=10.10.DD.DD/29
add area=HAMCOUNTY disabled=no network=192.168.EE.EE/30

j2sw · October 19, 2009, 3:07am

R3 is same config, just different networks.