From: Jeff Szeto (jytszeto@hotmail.com)
Date: Thu Apr 10 2003 - 12:56:31 GMT-3
Thank you for everyone's help.
I have just upgrade the IOS, but same problem resulted.
I try to debug the ping and found something interesting. When the ping
unsuccessful, it shows "encapsulation failed",
could someone explain the meaning?
Thank you.
Switch#ping 172.16.56.6
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.56.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
Switch#
06:33:15: datagramsize=100, IP 35: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending
06:33:15: datagramsize=114, IP 35: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending full packet
06:33:15: datagramsize=118, IP 35: s=172.16.56.6 (Vlan123), d=172.16.56.123,
totlen 100, fragment 0, fo 0, rcvd 1
06:33:15: datagramsize=100, IP 36: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending
06:33:15: datagramsize=114, IP 36: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending full packet
06:33:15: datagramsize=118, IP 36: s=172.16.56.6 (Vlan123), d=172.16.56.123,
totlen 100, fragment 0, fo 0, rcvd 1
06:33:15: datagramsize=100, IP 37: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending
06:33:15: datagramsize=114, IP 37: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending full packet
06:33:15: datagramsize=118, IP 37: s=172.16.56.6 (Vlan123), d=172.16.56.123,
totlen 100, fragment 0, fo 0, rcvd 1
06:33:15: datagramsize=100, IP 38: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending
06:33:15: datagramsize=114, IP 38: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending full packet
06:33:15: datagramsize=118, IP 38: s=172.16.56.6 (Vlan123), d=172.16.56.123,
totlen 100, fragment 0, fo 0, rcvd 1
06:33:15: datagramsize=100, IP 39: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending
06:33:15: datagramsize=114, IP 39: s=172.16.56.123 (local), d=172.16.56.6
(Vlan123), totlen 100, fragment 0, fo 0, sending full packet
06:33:15: datagramsize=118, IP 39: s=172.16.56.6 (Vlan123), d=172.16.56.123,
totlen 100, fragment 0, fo 0, rcvd 1
Switch#
Switch#ping 172.16.56.5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.56.5, timeout is 2 seconds:
06:33:25: datagramsize=100, IP 40: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, sending.
06:33:28: datagramsize=100, IP 40: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, encapsulation failed
06:33:28: datagramsize=100, IP 41: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, sending.
06:33:31: datagramsize=100, IP 41: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, encapsulation failed
06:33:31: datagramsize=100, IP 42: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, sending.
06:33:34: datagramsize=100, IP 42: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, encapsulation failed
06:33:34: datagramsize=100, IP 43: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, sending.
06:33:37: datagramsize=100, IP 43: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, encapsulation failed
06:33:37: datagramsize=100, IP 44: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, sending.
Success rate is 0 percent (0/5)
Switch#
06:33:40: datagramsize=100, IP 44: s=172.16.56.123 (local), d=172.16.56.5
(Vlan123), totlen 100, fragment 0, fo 0, encapsulation failed
----- Original Message -----
From: "Jung, Jin" <jin.jung@lmco.com>
To: "'Szeto Jeff'" <jytszeto@hotmail.com>; <ccielab@groupstudy.com>
Sent: Thursday, April 10, 2003 9:51 PM
Subject: RE: bvi help please
>
> It looks like all your IP addresses are in same subnet,
> Other config looks okay,
>
> You may want to make VLAN 2 or Vlan 123 different subnet,
>
> Remember that, if des ip add is in same subnet, it will not be routed,
local
> ping, and since ports are in different Vlan of switch, ping will fail,
>
> When u want to route the packets using BVI interface, you need to make the
> subnets different.
>
> Jin jung...
>
> -----Original Message-----
> From: Szeto Jeff [mailto:jytszeto@hotmail.com]
> Sent: Tuesday, April 08, 2003 11:02 PM
> To: ccielab@groupstudy.com
> Subject: bvi help please
>
>
> Hi,
>
> I am following the example in
> http://www.groupstudy.com/archives/ccielab/200207/msg01615.html
> but need help.
>
> Router6-f0/0----------f0/24-Cat3550-f0/12-------Router5
> Router1-e0------------f0/4-
>
> Router 6 and 3550 form an isl trunk, Router 5 is in vlan 2 Router 1 is in
> vlan 123.
>
> The routers can ping each other with no problem but the switch cannot ping
> Router 5 if I put the ip address in vlan 123 of the switch.
> If the ip address is in vlan 2, it can ping Router 5.
>
> Config of the routers and switch.
>
> Switch
>
> interface FastEthernet0/4
> switchport access vlan 123
>
> interface FastEthernet0/12
> switchport access vlan 2
>
> interface FastEthernet0/24
> switchport trunk encapsulation isl
> switchport mode trunk
>
> interface Vlan1
> no ip address
>
> interface Vlan2
> no ip address
>
> interface Vlan123
> ip address 172.16.56.123 255.255.255.0
>
> ip default-gateway 172.16.56.6
>
>
> Router 6
>
> bridge irb
> interface FastEthernet0/0.1
> encapsulation isl 1
> no ip redirects
> bridge-group 2
> !
> interface FastEthernet0/0.2
> description connecting to Router 5
> encapsulation isl 2
> no ip redirects
> bridge-group 2
> !
> interface FastEthernet0/0.3
> description for switch and Router 1
> encapsulation isl 123
> no ip redirects
> bridge-group 2
>
> interface BVI2
> ip address 172.16.56.6 255.255.255.0
>
> bridge 1 protocol ieee
> bridge 1 route ip
> bridge 2 protocol ieee
> bridge 2 route ip
>
> Router 5 f0/0: ip add 172.16.56.5/24
> Router 1 e0: ip add 172.16.56.200/24
>
> Thank you very much.
>
> Jeff
>
>
>
>
>
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This archive was generated by hypermail 2.1.4 : Thu May 01 2003 - 13:35:50 GMT-3