Can't ping to T1 Wic

[tkarran]

Hi am a newbie to Cisco.

I have a Cisco 2621xm with two ethernet port and 1 T1 WIC. I have Ip set on Ethernet0 10.5.x.x 255.255.255.0 and on T1 to 10.1.X.X 255.255.255.0.

Does anyone know why I can't ping to the T1 ip from the router itself.

Any help would be greatly appreciated.

[deilert]

in order to ping the interfaces they must be up up can you paste in a sh int e0 and sh int serial x

[tkarran]

Hi deilert, thanks for the response. Here's it is.

VIRCIS20.2#show interface fastethernet0/0

FastEthernet0/0 is up, line protocol is up

Hardware is AmdFE, address is 000c.31eb.e5c0 (bia 000c.31eb.e5c0)

Internet address is 10.5.20.2/16

MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA, loopback not set

Keepalive set (10 sec)

Half-duplex, 100Mb/s, 100BaseTX/FX

ARP type: ARPA, ARP Timeout 04:00:00

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of "show interface" counters 14:51:32

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue :0/40 (size/max)

5 minute input rate 3000 bits/sec, 5 packets/sec

5 minute output rate 1000 bits/sec, 3 packets/sec

100130 packets input, 11498890 bytes

Received 88510 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog

0 input packets with dribble condition detected

14620 packets output, 1574266 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 babbles, 0 late collision, 0 deferred

66 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

VIRCIS20.2#

VIRCIS20.2#show interface serial0/0

Serial0/0 is up, line protocol is up

Hardware is PQUICC with Fractional T1 CSU/DSU

Internet address is 10.1.11.1/24

MTU 1524 bytes, BW 1536 Kbit, DLY 100 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation HDLC, loopback not set

Keepalive not set

Last input 00:00:02, output 00:00:56, output hang never

Last clearing of "show interface" counters 14:52:34

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue :0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

12136 packets input, 497484 bytes, 0 no buffer

Received 12136 broadcasts, 0 runts, 2 giants, 0 throttles

940 input errors, 234 CRC, 481 frame, 0 overrun, 0 ignored, 223 abort

1118 packets output, 320577 bytes, 0 underruns

0 output errors, 0 collisions, 5 interface resets

0 output buffer failures, 0 output buffers swapped out

4 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

[deilert]

you have no keep configured on serial 0/0 ,with this configured line protocol will never drop , This maike line protocol look up but it really is not . what does the config for the interface on the other side of this line look like ? does it have keepalives configured ? if not you should configure keepalives on both sides 'keep 10' then see if line protocol comes up .

[deilert]

can you also paste in a sh run

[tkarran]

Hi Deilert,

I turned on Keepalive and sure enough the line protocol went down. At the remote end I have a Larscom CSU\DSU, am not sure what the config for keepalive is set for, I have to go over and get the config. In the meantime here's the running config for the Cisco2621. Thanks again.

VIRCIS20.2#show running-config

Building configuration...

Current configuration : 885 bytes

!

version 12.2

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname VIRCIS20.2

!

boot system flash c2600-i-mz.122-8.T10.bin

enable secret xxxxxxxxxx

enable password XXXXX

!

ip subnet-zero

!

!

!

!

!

!

interface FastEthernet0/0

ip address 10.5.20.2 255.255.0.0

ip ospf authentication

no ip mroute-cache

speed auto

half-duplex

!

interface Serial0/0

mtu 1524

ip address 10.1.11.1 255.255.255.0

no ip mroute-cache

delay 10

no keepalive

autodetect encapsulation ppp

roles

role default

no fair-queue

service-module t1 clock source internal

!

interface FastEthernet0/1

no ip address

no ip mroute-cache

shutdown

duplex auto

speed auto

!

ip classless

ip route profile

ip http server

ip ospf name-lookup

ip pim bidir-enable

!

!

!

line con 0

line aux 0

line vty 0 4

password XXXXXXX

!

!

end

[deilert]

On serial 0/0 you have clock-source internal configured , make sure that the router on the other side is configured for clock source external or network , I am not sure of the exact syntax. Also the keepalive on that serial interface must be 10 seconds if it is not already , the keepalived and encap must match on both routers

[tkarran]

Hey deilert,

Guess what before I went over to the remote site, I Changed the encapsulation to PPP instead of HDLC on the serial port, guess what the line protocol came up. I can ping the remote router, also I could ping the T1 WIC interface from my workstation. But I still can't ping the T1 WIC from the router itself, is this normal?

[deilert]

are you pinging like this

router > ping 10.1.11.1

.....

router>

When you ping your own interface the pings travel to the serial interface at the remote end then comes back . If you can ping the remote serial interface you should be able to ping your own serial interface .

[tkarran]

Hey Deilert,

Could it possibly be bacause I have the two ip address set in the same subnet.

The serial interface on my end is set for 10.1.11.1/24

The serial interface on the remote end is set for 10.1.11.2/16.

Could this possibly be the problem

Thanks again

[deilert]

yes

this needs to be corrected , I am suprised you can ping the remote end , make both end /24 this should hook you up .

[tkarran]

Hi,

I have both end set to 24 and still can't ping to the T1 interface.

[deilert]

can you paste in a sh ip route 10.1.11.1 & 10.1.11.2 on both routers

[tkarran]

Hi, Here it is, Note: 10.1.11.2 is a 3com router.

IP Route on 10.1.11.1

10.0.0.0/8 is variably subnetted, 3 subnets, 3 masks

C 10.1.11.0/24 is directly connected, Serial0/0

C 10.1.11.2/32 is directly connected, Serial0/0

C 10.5.0.0/16 is directly connected, FastEthernet0/0

192.168.0.0/26 is subnetted, 1 subnets

S 192.168.0.0 [1/0] via 10.1.11.2

IP Routing Table for 10.1.11.2 - 3Com Router

-------------------------------IP Routing Table--------------------------------

Total Routes = 3, Total Direct Networks = 2

Destination Mask Gateway Metric Status TTL Source

10.1.11.0 255.255.255.0 10.1.11.2 0 Up -- Connected

192.168.0.0 255.255.255.0 192.168.0.49 0 Up -- Connected

192.168.141.0 255.255.255.0 !4 1 -- -- Static

[deilert]

Ok now it is a little clearer , You have a cisco connected to a 3com , If this is true you must use PPP , hdlc is vendor specific, try this and see what happens