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no connection between 876 and a switch

Hello ,

my problem is to connect a cisco 876 to a lan. When I connect to the fastethernet 0,1 ,2 , with a crossover to a pc i can connect to the router over telnet and ping it.

But when I connect the router on fastethernet 0 or 1,2,3 I can't connect to the router and on the router I'm only able to ping himself.

a debug ip packet shows:

telnet 192.168.251.1

Trying 192.168.251.1 ...

*Mar 1 10:38:10.282 CET: tcp0: O CLOSED 192.168.251.1:23 192.168.251.8:44032 seq 934063064

OPTS 4 SYN WIN 4128

*Mar 1 10:38:10.282 CET: IP: tableid=0, s=192.168.251.8 (local), d=192.168.251.1 (Vlan1), routed via RIB

*Mar 1 10:38:10.282 CET: IP: s=192.168.251.8 (local), d=192.168.251.1 (Vlan1),

len 44, sending

*Mar 1 10:38:10.282 CET: IP: s=192.168.251.8 (local), d=192.168.251.1 (Vlan1),

len 44, encapsulation failed

*Mar 1 10:38:12.282 CET: tcp0: R SYNSENT 192.168.251.1:23 192.168.251.8:44032 seq 934063064

OPTS 4 SYN WIN 4128

*Mar 1 10:38:12.282 CET: IP: tableid=0, s=192.168.251.8 (local), d=192.168.251.1 (Vlan1), routed via RIB

*Mar 1 10:38:12.282 CET: IP: s=192.168.251.8 (local), d=192.168.251.1 (Vlan1),

len 44, sending

please help

the configuration of the 876 is attached,

sh ver:

Cisco IOS Software, C870 Software (C870-ADVENTERPRISEK9-M), Version 12.4(15)T6,

RELEASE SOFTWARE (fc2)

Cisco 876 (MPC8272) processor (revision 0x200) with 118784K/12288K bytes of memory.

Processor board ID FCZ104820LY

MPC8272 CPU Rev: Part Number 0xC, Mask Number 0x10

4 FastEthernet interfaces

1 ISDN Basic Rate interface

1 ATM interface

128K bytes of non-volatile configuration memory.

24576K bytes of processor board System flash (Intel Strataflash)

Configuration register is 0x2102

3 REPLIES

Re: no connection between 876 and a switch

Hello, how is the Switchport configured?

On which vlan is the Switch Management IP, VLAN1?

Maybe a show run interface xx where the router is connected to, helps us.

Will the switch route, who is 192.168.251.1 (seperate router) ?

Sebastian

Bronze

Re: no connection between 876 and a switch

Besides what was requested before, if the interface is down/down, make sure you are using the correct cable (straight)

Re: no connection between 876 and a switch

Hello, how is the Switchport configured?

On which vlan is the Switch Management IP, VLAN1?

Maybe a show run interface xx where the router is connected to, helps us.

Will the switch route, who is 192.168.251.1 (seperate router) ?

Sebastian

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