RE: Not able to ping loopback interface

Piotr, I have enabled normal OSPF routing for Loopback0 interfaces.

I have to admit I am just starting looking at MPLS configs so excuse me if I
am asking stupid questions or something don't make sense :(-

I have attached the configuration. If you can let me know what is wrong.

Thanks Again, Appreciate your help in this.

-Yuri

> Date: Tue, 6 Oct 2009 23:10:19 +0200
> Subject: Re: Not able to ping loopback interface
> From: piotr_at_ccie1.com
> To: ebay_products_at_hotmail.com
> CC: ccielab_at_groupstudy.com
>
> This is because you do not have any non-VRF interface between R2 and R4.
> If you enable "normal" OSPF routing this will be considered as
> "global" routing table accessed by "sho ip route".
> If you want to access Lo0 you have two options:
> 1. configure non-VRF interface between R2 and R4 and run OSPF on it
> 2. assign Lo0 to the same VRF on both sides
>
> Regards,
> Piotr
>
>
> 2009/10/6 Cisco Fanatic <ebay_products_at_hotmail.com>:
> > Thanks Piotr, you are right. I check the OSPF config and it seems to work
now.
> > But, the loopback0 is not working now :(-
> >
> > !
> > router ospf 24 vrf R2_VRF_24
> > log-adjacency-changes
> > network 150.1.24.2 0.0.0.0 area 0
> > network 150.1.124.2 0.0.0.0 area 0
> > !
> > router ospf 42 vrf R2_VRF_42
> > network 150.1.42.2 0.0.0.0 area 0
> > network 150.1.142.2 0.0.0.0 area 0
> > !
> > router ospf 1
> > network 150.1.2.2 0.0.0.0 area 0
> > !
> >
> > The R4 Loopback0 (150.1.4.4, on the other side) is not in any VRF.
> >
> > R2#ping 150.1.4.4
> >
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 150.1.4.4, timeout is 2 seconds:
> > .....
> > Success rate is 0 percent (0/5)
> >
> > -Yuri
> >
> >> Date: Tue, 6 Oct 2009 21:38:48 +0200
> >> Subject: Re: Not able to ping loopback interface
> >> From: piotr_at_ccie1.com
> >> To: ebay_products_at_hotmail.com
> >> CC: ccielab_at_groupstudy.com
> >>
> >> Hi,
> >>
> >> You should have VRF aware OSPF configured. Take a look at your example
> >> and check if you have OSPF neighbor relationship established. I bet
> >> you don't.
> >>
> >>
> >> R2:
> >> no router ospf 1
> >> router ospf 1 vrf R2_VRF_24
> >> network 150.1.24.2 0.0.0.0 area 0
> >> network 150.1.124.2 0.0.0.0 area 0
> >> router ospf 2 vrf R2_VRF_42
> >> network 150.1.42.2 0.0.0.0 area 0
> >> network 150.1.142.2 0.0.0.0 area 0
> >>
> >>
> >>
> >> R4:
> >> no router ospf 1
> >> router ospf 1 vrf R4_VRF_24
> >> network 150.1.24.4 0.0.0.0 area 0
> >> network 150.1.124.4 0.0.0.0 area 0
> >> router ospf 2 vrf R4_VRF_42
> >> network 150.1.42.4 0.0.0.0 area 0
> >> network 150.1.142.4 0.0.0.0 area 0
> >>
> >>
> >> HTH,
> >>
> >> --
> >> Piotr Matusiak
> >> CCIE #19860 (R&S, SEC)
> >>
> >>
> >>
> >> 2009/10/6 Cisco Fanatic <ebay_products_at_hotmail.com>:
> >> > All, I have configured MPLS VRF on the interfaces. But, I am not able
to
> > ping
> >> > the loopback interfaces. Can someone let me know as why? Am I missing
> >> > something here.
> >> >
> >> > Thanks,
> >> > -Yuri
> >> >
> >> > R2
> >> > ++
> >> > !
> >> > mpls label protocol ldp
> >> > !
> >> > ip vrf R2_VRF_24
> >> > rd 24:24
> >> > !
> >> > ip vrf R2_VRF_42
> >> > rd 42:42
> >> > !
> >> > interface Loopback0
> >> > ip address 150.1.2.2 255.255.255.255
> >> > !
> >> > interface Loopback24
> >> > ip vrf forwarding R2_VRF_24
> >> > ip address 150.1.124.2 255.255.255.255
> >> > !
> >> > interface Loopback42
> >> > ip vrf forwarding R2_VRF_42
> >> > ip address 150.1.142.2 255.255.255.255
> >> > !
> >> > interface Ethernet0/0
> >> > ip address 150.1.24.2 255.255.255.0
> >> > mpls ip
> >> > !
> >> > interface Ethernet0/0.24
> >> > encapsulation dot1Q 24
> >> > ip vrf forwarding R2_VRF_24
> >> > ip address 150.1.24.2 255.255.255.0
> >> > !
> >> > interface Ethernet0/0.42
> >> > encapsulation dot1Q 42
> >> > ip vrf forwarding R2_VRF_42
> >> > ip address 150.1.42.2 255.255.255.0
> >> > !
> >> > router ospf 1
> >> > log-adjacency-changes
> >> > network 150.1.2.2 0.0.0.0 area 0
> >> > network 150.1.24.2 0.0.0.0 area 0
> >> > network 150.1.124.2 0.0.0.0 area 0
> >> > network 150.1.142.2 0.0.0.0 area 0
> >> > !
> >> >
> >> > R4
> >> > ++
> >> > !
> >> > mpls label protocol ldp
> >> > !
> >> > ip vrf R4_VRF_24
> >> > rd 24:24
> >> > !
> >> > ip vrf R4_VRF_42
> >> > rd 42:42
> >> > !
> >> > interface Loopback0
> >> > ip address 150.1.4.4 255.255.255.255
> >> > !
> >> > interface Loopback24
> >> > ip vrf forwarding R4_VRF_24
> >> > ip address 150.1.124.4 255.255.255.255
> >> > !
> >> > interface Loopback42
> >> > ip vrf forwarding R4_VRF_42
> >> > ip address 150.1.142.4 255.255.255.255
> >> > !
> >> > interface Ethernet0/0
> >> > no ip address
> >> > mpls ip
> >> > !
> >> > interface Ethernet0/0.24
> >> > encapsulation dot1Q 24
> >> > ip vrf forwarding R4_VRF_24
> >> > ip address 150.1.24.4 255.255.255.0
> >> > !
> >> > interface Ethernet0/0.42
> >> > encapsulation dot1Q 42
> >> > ip vrf forwarding R4_VRF_42
> >> > ip address 150.1.42.4 255.255.255.0
> >> > !
> >> > router ospf 1
> >> > log-adjacency-changes
> >> > network 150.1.4.4 0.0.0.0 area 0
> >> > network 150.1.24.4 0.0.0.0 area 0
> >> > network 150.1.45.4 0.0.0.0 area 0
> >> > network 150.1.124.4 0.0.0.0 area 0
> >> > network 150.1.142.4 0.0.0.0 area 0
> >> > !
> >> >
> >> > Success rate is 0 percent (0/5)
> >> > R2#ping vrf R2_VRF_24 150.1.24.4
> >> >
> >> > Type escape sequence to abort.
> >> > Sending 5, 100-byte ICMP Echos to 150.1.24.4, timeout is 2 seconds:
> >> > .!!!!
> >> > Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/4 ms
> >> >
> >> > R2#ping vrf R2_VRF_42 150.1.42.4
> >> >
> >> > Type escape sequence to abort.
> >> > Sending 5, 100-byte ICMP Echos to 150.1.42.4, timeout is 2 seconds:
> >> > .!!!!
> >> > Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/4 ms
> >> >
> >> > R2#ping vrf R2_VRF_24 150.1.124.4 <--
> >> >
> >> > Type escape sequence to abort.
> >> > Sending 5, 100-byte ICMP Echos to 150.1.124.4, timeout is 2 seconds:
> >> > .....
> >> >
> >> > R2#sh ip vrf int
> >> > Interface IP-Address VRF
> >> > Protocol
> >> > Lo24 150.1.124.2 R2_VRF_24
> > up
> >> > Et0/0.24 150.1.24.2 R2_VRF_24
> > up
> >> > Lo42 150.1.142.2 R2_VRF_42
> > up
> >> > Et0/0.42 150.1.42.2 R2_VRF_42
> > up
> >> >
> >> > R4#sh ip vrf int
> >> > Interface IP-Address VRF
> >> > Protocol
> >> > Lo24 150.1.124.4 R4_VRF_24
> > up
> >> > Et0/0.24 150.1.24.4 R4_VRF_24
> > up
> >> > Lo42 150.1.142.4 R4_VRF_42
> > up
> >> > Et0/0.42 150.1.42.4 R4_VRF_42
> > up
> >> >
> >> >
> >> >
> >> >
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Received on Tue Oct 06 2009 - 19:32:04 ART