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Why is s0/0.1 down?

gergokarpati
Level 1
Level 1

Dear All,

Recently my lab did grind my gears and I simply cannot figure it out why my frame-relay config wont work.

ospf_fr.jpg

This is the topology I use.

R1 Uses a Multipoint S0/0.1 interface and OSPF works fine in the area with routers R2 and R3.

R1:

R1#sh frame-relay map

Serial0/0.1 (up): ip 10.0.0.2 dlci 102(0x66,0x1860), static,

              CISCO, status defined, active

Serial0/0.1 (up): ip 10.0.0.3 dlci 103(0x67,0x1870), static,

              CISCO, status defined, active

Serial0/0.1 (up): ip 10.0.0.4 dlci 104(0x68,0x1880), static,

              CISCO, status defined, active

R4:

R4#sh frame-relay map

Serial0/0.1 (down): point-to-point dlci, dlci 401(0x191,0x6410), broadcast

          status defined, inactive

R4#sh ip ospf interface

Serial0/0.1 is down, line protocol is down

  Internet Address 10.0.0.4/24, Area 0

  Process ID 1, Router ID 4.4.4.4, Network Type POINT_TO_POINT, Cost: 64

  Transmit Delay is 1 sec, State DOWN

  Timer intervals configured, Hello 20, Dead 80, Wait 80, Retransmit 5

    oob-resync timeout 80

R4#sh run:

!

interface Serial0/0

no ip address

encapsulation frame-relay

clock rate 2000000

!

interface Serial0/0.1 point-to-point

ip address 10.0.0.4 255.255.255.0

ip ospf hello-interval 20

frame-relay interface-dlci 401

!

from the sh run one can see that the s0/0.1 should be up.

R4#sh ip int br

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            unassigned      YES unset  administratively down down

Serial0/0                  unassigned      YES unset  up                    down

Serial0/0.1                10.0.0.4        YES manual down                  down

FastEthernet0/1            unassigned      YES unset  administratively down down

any ideas/help would be appreciated!

Thanks in advance!

1 Accepted Solution

Accepted Solutions

cadet alain
VIP Alumni
VIP Alumni

Hi,

your main interface is up/down so that's why your subinterface is down/down.

Can you post your FR switch config.

Regards

Alain

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Don't forget to rate helpful posts.

View solution in original post

2 Replies 2

cadet alain
VIP Alumni
VIP Alumni

Hi,

your main interface is up/down so that's why your subinterface is down/down.

Can you post your FR switch config.

Regards

Alain

Don't forget to rate helpful posts.

Don't forget to rate helpful posts.

Hi Alain!

Thanks for drawing my attention to it! after several times of shut/no shut I did add a new FRS and remapped the dlci-port allocation and with the new one it works...

guess more likely GNS3 related.

Anyways I misse the up/down severaltimes...

Thanks for the help!

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