is this sub interface or not

Answered Question
May 12th, 2009

hi all,

i have router showing

sh ip int brief

Interface IP-Address OK? Method Status Prot ocol

GigabitEthernet0/0 141.197.104.254 YES NVRAM up up

GigabitEthernet0/1 10.39.1.57 YES NVRAM up up

ATM0/IMA0 unassigned YES NVRAM administratively down down

ATM0/IMA0.777 unassigned YES unset administratively down down

ATM0/IMA1 unassigned YES NVRAM up up

ATM0/IMA1.777 10.254.5.89 YES NVRAM up up

ATM0/0/0 unassigned YES NVRAM down down

ATM0/0/1 unassigned YES NVRAM down down

Serial0/1/0:0 10.39.1.29 YES NVRAM up up *********************** 1

Serial0/1/1:0 10.39.1.53 YES NVRAM up up ********************** 2

ATM0/2/0 unassigned YES NVRAM up up

ATM0/2/1 unassigned YES NVRAM up up

ATM0/3/0 unassigned YES NVRAM up up

ATM0/3/1 unassigned YES NVRAM up up

Serial1/0 10.39.1.21 YES NVRAM down down

Serial1/1 unassigned YES NVRAM administratively down down

Serial1/2 unassigned YES NVRAM administratively down down

Serial1/3 unassigned YES NVRAM administratively down down

Loopback0 10.39.15.1 YES NVRAM up up

Tunnel0 10.39.1.93 YES NVRAM up up

My question is if serial 1 and 2 are subinterfaces or hey are actual physical interfaces.

many thanks

I have this problem too.
0 votes
Correct Answer by John Blakley about 7 years 7 months ago

Mahesh,

Your serial interfaces are what I explained above, and the T0/1/0 and T0/1/1 are the same serial card, but different ports on the same card.

John

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John Blakley Tue, 05/12/2009 - 10:52

No, those are serial interfaces:

Serial 0/1/0:0

Serial 0/1/1:0

There is 1 serial card 0/1 and two ports 0:0 and 1:0.

The ":0" is the group that they belong to. If you look on the router, you'll probably see something like:

controller t1 0/0

channel-group 0 timeslots 1 - 24

controller t1 0/1

channel-group 0 timeslots 1 - 24

The "channel-group" number is appended to the card identifier to show you what group it's a member of.

HTH,

John

mahesh18 Tue, 05/12/2009 - 11:08

Hi hohn,

thanks for reply.

here i see router config

controller T1 0/0/0

mode atm aim 0

framing esf

linecode b8zs

!

controller T1 0/0/1

mode atm aim 0

framing esf

linecode b8zs

!

controller T1 0/1/0

framing esf

linecode b8zs

channel-group 0 timeslots 1-24

!

controller T1 0/1/1

framing esf

linecode b8zs

channel-group 0 timeslots 1-24

!

controller T1 0/2/0

mode atm aim 1

framing esf

linecode b8zs

!

controller T1 0/2/1

mode atm aim 1

framing esf

linecode b8zs

!

controller T1 0/3/0

mode atm aim 1

framing esf

linecode b8zs

so serail0/1 card which has 2 ports 0:0

and 0:1 belongs to which T1 controllers from above?

thanks

mahesh

Richard Burts Tue, 05/12/2009 - 11:38

Mahesh

In your original post are these lines:

Serial0/1/0:0 10.39.1.29 YES NVRAM up up *********************** 1

Serial0/1/1:0 10.39.1.53 YES NVRAM up up ********************** 2

and they belong to these T1 controllers:

controller T1 0/1/0

framing esf

linecode b8zs

channel-group 0 timeslots 1-24

!

controller T1 0/1/1

framing esf

linecode b8zs

channel-group 0 timeslots 1-24

HTH

Rick

mahesh18 Tue, 05/12/2009 - 12:02

Hi Rick,

thanks for reply

correct me if i am wrong

so this means we have one serial card se0/1 and it has 2 slots 0:0 and 1:0

and T1 0/1/0 is same as Serial0/1/0:0

thanks

mahehs

Correct Answer
John Blakley Tue, 05/12/2009 - 12:11

Mahesh,

Your serial interfaces are what I explained above, and the T0/1/0 and T0/1/1 are the same serial card, but different ports on the same card.

John

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