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IP Stack not activated on the WAN interface

benthomas
Level 1
Level 1

I'm trying to connect two routers (7206 and 2600) via a serial

interface over IP. Currently the serial communicates perfectly via IPX.

I've just confgured ip addresses on both sides with a /30 mask and

encapsulation is PPP but they cannot ping each other. I even tried HDLC

but the IP stack on the interface cannot even open. I have attached the

"show interface" command output of both routers:

2600 Router

Serial1/0 is up, line protocol is up

Hardware is CD2430 in sync mode

Description: LINK TO SAFEX

Internet address is 192.168.15.70/30

MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 5/255

Encapsulation PPP, loopback not set

Keepalive set (10 sec)

DTR is pulsed for 4294967 seconds on reset, Restart-Delay is 541942

secs

LCP Open

Closed: CDPCP

Open: IPXCP

Last input 00:00:01, output 00:00:01, output hang never

Last clearing of "show interface" counters 1w5d

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 0 drops

5 minute input rate 4000 bits/sec, 2 packets/sec

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

489253 packets input, 111702134 bytes, 0 no buffer

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

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

abort

599055 packets output, 25929293 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

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

7206 Router

SAFEX-7200-2#sh int s3/0:10

Serial3/0:10 is up, line protocol is up

Hardware is Multichannel E1

Description: "Market Traders, Tim Gibson #57-03048-00"

Internet address is 192.168.15.69/30

MTU 1500 bytes, BW 64 Kbit, DLY 20000 usec,

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

Encapsulation PPP, crc 16, CRC 16, Data non-inverted

Keepalive set (10 sec)

LCP Open

Open: IPXCP

Last input 00:00:14, output 00:00:00, output hang never

Last clearing of "show interface" counters 10:49:38

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

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/4/16 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

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

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

60631 packets input, 3053947 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0* throttles

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

42071 packets output, 13260031 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

no alarm present

Timeslot(s) Used:10, subrate: 64Kb/s, transmit delay is 0 flags

8 Replies 8

thisisshanky
Level 11
Level 11

Can you paste your configs, as well as a show ip route on either ends.

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

Is it possible that one (or both) routers have configured "no ip routing"?

In addition to the configs I think it would be helpful to post the output of show ip protocol.

HTH

Rick

HTH

Rick

Rick,

Find attached the output for the relevant show commands:

show version

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-D-M), Version 12.0(5)T1, RELEASE SOFTWARE (fc1)

Copyright (c) 1986-1999 by cisco Systems, Inc.

Compiled Tue 17-Aug-99 13:11 by cmong

Image text-base: 0x80008088, data-base: 0x80859E60

ROM: System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1)

MarketTraders uptime is 2 weeks, 2 days, 2 hours, 3 minutes

System returned to ROM by power-on at 12:12:43 CAT Tue Sep 5 2000

System image file is "flash:c2600-d-mz.120-5.T1.bin"

cisco 2610 (MPC860) processor (revision 0x203) with 20480K/4096K bytes of memory

.

Processor board ID JAD0345028H (4058204952)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

1 Ethernet/IEEE 802.3 interface(s)

4 Low-speed serial(sync/async) network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

8192K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

-----------------------------------------------------------------------

NB! NB! command show ip protocol RETURNS NOTHING ?????

show protocols

Global values:

Internet Protocol routing is enabled

IPX routing is enabled

Ethernet0/0 is up, line protocol is up

Internet address is 10.100.3.209/28

IPX address is 3435792.0030.94ab.01a0

Serial1/0 is up, line protocol is up

Internet address is 192.168.15.70/30

IPX address is 3435793.0030.94ab.01a0

-----------------------------------------------------------------------

show ip route

Gateway of last resort is not set

S 196.26.125.0/24 [1/0] via 192.168.15.69

192.168.15.0/30 is subnetted, 1 subnets

C 192.168.15.68 is directly connected, Serial1/0

10.0.0.0/8 is variably subnetted, 3 subnets, 2 masks

S 10.3.12.0/22 [1/0] via 192.168.15.69

S 10.3.4.0/22 [1/0] via 192.168.15.69

C 10.100.3.208/28 is directly connected, Ethernet0/0

-----------------------------------------------------------------------

show ip interface s1/0

Serial1/0 is up, line protocol is up

Internet address is 192.168.15.70/30

Broadcast address is 255.255.255.255

Address determined by setup command

MTU is 1500 bytes

Helper address is not set

Directed broadcast forwarding is disabled

Outgoing access list is not set

Inbound access list is not set

Proxy ARP is enabled

Security level is default

Split horizon is enabled

ICMP redirects are always sent

ICMP unreachables are always sent

ICMP mask replies are never sent

IP fast switching is enabled

IP fast switching on the same interface is enabled

IP Flow switching is disabled

IP Fast switching turbo vector

IP multicast fast switching is disabled

IP multicast distributed fast switching is disabled

Router Discovery is disabled

IP output packet accounting is disabled

IP access violation accounting is disabled

TCP/IP header compression is disabled

RTP/IP header compression is disabled

Bennie

Thanks for posting the additional information. On the 2600 side it looks ok and I do not see anything that looks like a problem. Perhaps you could post similar data from the 7206?

When you do show ipx route do you see any routes on the 2600 that are learned from the 7206? This would be one way of demonstrating that the serial interface was working.

I also wonder if CDP would tell us anything useful? Although I notice that CDPCP is not open and wonder if CDP has been turned off.

HTH

Rick

HTH

Rick

Rick,

These guys (2600) are connecting and trading fine using IPX.

These are the outputs from the 7200 Router:

SAFEX-7200-2#sh ver

Cisco Internetwork Operating System Software

IOS (tm) 7200 Software (C7200-DK2O3S-M), Version 12.0(7)T3, RELEASE SOFTWARE (fc1)

TAC Support: http://www.cisco.com/tac

Copyright (c) 1986-2003 by cisco Systems, Inc.

Compiled Thu 03-Jul-03 20:33 by dchih

Image text-base: 0x60008900, data-base: 0x61242000

ROM: System Bootstrap, Version 11.1(13)CA, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)

BOOTFLASH: 7200 Software (C7200-BOOT-M), Version 11.3(9)T, RELEASE SOFTWARE (fc1)

SAFEX-7200-2 uptime is 21 weeks, 5 hours, 40 minutes

System returned to ROM by power-on

System image file is "slot0:c7200-dk2o3s-mz.120-7.T3"

cisco 7206 (NPE200) processor with 122880K/8192K bytes of memory.

R5000 CPU at 200Mhz, Implementation 35, Rev 2.1, 512KB L2 Cache

6 slot midplane, Version 1.3

Last reset from power-on

Channelized E1, Version 1.0.

Bridging software.

X.25 software, Version 3.0.0.

Primary Rate ISDN software, Version 1.1.

2 FastEthernet/IEEE 802.3 interface(s)

132 Serial network interface(s)

6 Channelized E1/PRI port(s)

Configuration register is 0x102

SAFEX-7200-2#sh ip int s3/0:10

Serial3/0:10 is up, line protocol is up

Internet address is 192.168.15.69/30

Broadcast address is 255.255.255.255

Address determined by setup command

MTU is 1500 bytes

Helper address is not set

Directed broadcast forwarding is disabled

Proxy ARP is enabled

Security level is default

Split horizon is enabled

ICMP redirects are always sent

ICMP unreachables are always sent

ICMP mask replies are never sent

IP fast switching is enabled

IP fast switching on the same interface is enabled

IP Flow switching is enabled

IP Flow switching turbo vector

IP Null turbo vector

IP multicast fast switching is enabled

IP multicast distributed fast switching is disabled

IP route-cache flags are Fast, Flow

Router Discovery is disabled

IP output packet accounting is disabled

IP access violation accounting is disabled

TCP/IP header compression is disabled

SAFEX-7200-2#sh ip protocol

Routing Protocol is "ospf 26125"

Sending updates every 0 seconds

Invalid after 0 seconds, hold down 0, flushed after 0

Outgoing update filter list for all interfaces is

Incoming update filter list for all interfaces is

Redistributing: connected, static, ospf 26125

Routing for Networks:

10.3.2.0/24

196.26.125.0

Routing Information Sources:

Gateway Distance Last Update

192.168.99.3 110 13w6d

10.3.18.19 110 1d04h

192.168.99.2 110 5w6d

10.3.18.18 110 1d04h

10.3.18.17 110 1d04h

10.3.18.16 110 1d04h

192.168.99.5 110 1d04h

192.168.99.4 110 1d04h

192.168.38.1 110 1d04h

196.26.123.244 110 04:37:17

196.26.123.247 110 03:48:37

196.26.123.246 110 04:37:16

196.26.123.248 110 04:37:16

172.16.1.1 110 1d04h

173.19.2.1 110 20w6d

198.198.196.1 110 1d04h

196.26.125.127 110 1d04h

Distance: (default is 110)

Bennie

Thanks for posting this information. Would you also post the output of show protocol from the 7206?

I notice on the 2600 show interface that CDPCP is closed and on the 7206 that CDPCP is not present. Is CDP disabled on the 7206 interface? If so would it be possible to enable CDP long enough to get the output of show cdp neighbor detail from both routers?

I also notice that on both routers the show interface does not indicate that IPCP is present. It should be present to run IP on the interface. I am puzzled why IPCP is not present. Would you be able to run debug ppp negotiat, shut down the interface, and then no shut the interface, and capture any debug output and post it (at least on the 2600 if you can not do it on the 7206)?

Rick

HTH

Rick

Their line become active on an IP level after they have done those commands requested on the 2600. CDP was not enabled on the serial on the 2600.

Many thanks for your assistance.

Tony.henry
Level 1
Level 1

Benthomas,

try a "sho ip route 192.168.15.68" the result should be that the subnet is directly connected to s1/0 and s3/0:10 respectively. This proves that IP is running on the interface.

There seems to some disparity in the configs. the safex side has the BW set at 64K whilst market traders has the link at 128K. I think a look at the configs would be in order.

Tony

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