ICMP showing encapsulation failed

From: Michael Zuo (mzuo@ixiacom.com)
Date: Thu Jan 25 2007 - 04:22:22 ART


Hi group,

I am scratching my head on this one (probably something basic), please
help! And thanks in advance....

R3(f0/1)---------(f0/4)CAT1(f0/14)-----------(f0/14)CAT2(f0/5)----------
-----R4(f0/0)

When I ping from R3 to R4, I get encapsulation failed message on R3:

R3(config-if)#do ping 172.16.34.4

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 172.16.34.4, timeout is 2 seconds:

2d07h: IP: tableid=0, s=172.16.34.3 (local), d=172.16.34.4
(FastEthernet0/1), ro

uted via RIB

2d07h: IP: s=172.16.34.3 (local), d=172.16.34.4 (FastEthernet0/1), len
100, send

ing

2d07h: IP: s=172.16.34.3 (local), d=172.16.34.4 (FastEthernet0/1), len
100, enca

psulation failed.

2d07h: IP: tableid=0, s=172.16.34.3 (local), d=172.16.34.4
(FastEthernet0/1), ro

uted via RIB

2d07h: IP: s=172.16.34.3 (local), d=172.16.34.4 (FastEthernet0/1), len
100, send

Ing

Configuration:

R3:

=======

R3(config-router)#do sh run int f0/1

Building configuration...

Current configuration : 96 bytes

!

interface FastEthernet0/1

 ip address 172.16.34.3 255.255.255.0

 duplex auto

 speed auto

end

R3(config-router)#

CAT1:

========

CAT1(config)#do sh run int f0/4

Building configuration...

Current configuration : 97 bytes

!

interface FastEthernet0/4

 switchport access vlan 30

 switchport mode access

 duplex full

end

CAT1(config)#do sh run int f0/14

Building configuration...

Current configuration : 137 bytes

!

interface FastEthernet0/14

 switchport trunk encapsulation dot1q

 switchport trunk allowed vlan 1,20,30,40

 switchport mode trunk

CAT1(config-if)#do sh run int vlan 30

Building configuration...

Current configuration : 63 bytes

!

interface Vlan30

 ip address 172.16.34.10 255.255.255.0

end

CAT2:

CAT2(config-if)#do sh run int f0/5

Building configuration...

Current configuration : 97 bytes

!

interface FastEthernet0/5

 switchport access vlan 30

 switchport mode access

 duplex full

end

CAT2(config-if)#do sh run int f0/14

Building configuration...

Current configuration : 137 bytes

!

interface FastEthernet0/14

 switchport trunk encapsulation dot1q

 switchport trunk allowed vlan 1,20,30,40

 switchport mode trunk

end

CAT2(config-if)#

R4

 =======

R4(config-router)#do sh run int f0/0

Building configuration...

Current configuration : 96 bytes

!

interface FastEthernet0/0

 ip address 172.16.34.4 255.255.255.0

 duplex auto

 speed auto

end

R4(config-router)#



This archive was generated by hypermail 2.1.4 : Thu Feb 08 2007 - 23:46:57 ART