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New Member

Why is s0/0.1 down?

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
Purple

Why is s0/0.1 down?

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.
2 REPLIES
Purple

Why is s0/0.1 down?

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.
New Member

Why is s0/0.1 down?

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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