From: ismail el-shalh (ishelh_mdsa@yahoo.com)
Date: Sat Sep 02 2006 - 16:26:07 ART
Hi sabrina, Hi every one
Here is the correct configuration :
(C3620-IS-M), Version 12.2(37)
Rack1R6#show run int eth0/0.263
interface Ethernet0/0.263
encapsulation dot1Q 263 native
ip address 204.12.1.6 255.255.255.0
end
SW1
Version 12.2(25)SEE2
Rack1SW1#show vlan dot1q tag native
dot1q native vlan tagging is disabled
interface FastEthernet0/6
switchport trunk encapsulation dot1q
switchport trunk native vlan 263
switchport trunk allowed vlan 6,263
switchport mode trunk
end
interface FastEthernet0/24
description CONNECTED TO BB3
switchport access vlan 263
switchport mode access
Rack1R6#ping 204.12.1.254 repeat 1
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 204.12.1.254, timeout is 2 seconds:
IP ARP: sent req src 204.12.1.6 0010.7b96.c921,
dst 204.12.1.254 0000.0000.0000 Ethernet0/0.263
IP ARP rep filtered src 204.12.1.254 0000.0c09.f442, dst 204.12.1.6 0010.7b96.c921 wrong cable, interface Ethernet0/0.
Success rate is 0 percent (0/1)
Now this configuration should work if you have the correct IOS/Router, as a remedy to my situation I had to enable vlan tagging globally on SW1 and this means that even the native vlan will be tagged.
What I am expecting that R6 is still tagging the frames out of the Ethernet even though the native vlan keyword is configured under its Ethernet interface
I may make sense because why R6 start sending the frames normally after I enable vlan dot1q tag native command globally on SW1? , By enabling this command I am telling SW1 to tag all the frames including the vlans which is configured to be native.
So when SW1 tag vlan 263 , it goes to R6 tagged and R6 Identify this frame because R6 is expecting this frame to reach tagged.
After enabling tagging globally on SW1
Rack1SW1#show vlan dot1q tag native
dot1q native vlan tagging is enabled
Rack1R6#ping 204.12.1.254 repeat 1
Type escape sequence to abort.
Sending 1, 100-byte ICMP Echos to 204.12.1.254, timeout is 2 seconds:
!
Success rate is 100 percent (1/1), round-trip min/avg/max = 4/4/4 ms
Rack1R6#
IP ARP: rcvd req src 204.12.1.254 0000.0c09.f442, dst 204.12.1.54 Ethernet0/0.263
Ismail El-Shalh
sabrina pittarel <sabri_esame@yahoo.com> wrote: Hi Ismail,
for the benefit of other people reading your posts, can you confirm that the problem you were seeing during the Mock lab was caused by a missing "native" keyword under the "encapsulation" command on the ethernet subinterface of R6?
Can you post the correct config?
Sabrina
----- Original Message ----
From: ismail el-shalh
To: ccielab
Sent: Saturday, September 2, 2006 4:43:35 AM
Subject: Re: Mock lab 1 : TASK 1.3 (Router on a stick)
I troubleshoot this yesterday for more than three hours I was trying to let R6 communicate with BB3 while native vlan option is configured under the interfaces (SW1 and R6) without enabling the vlan dot1q tag native globally but it was not working.
After all, I changed the router itself with more modern one (2600XM) and once I try it , it start working without any problem ,
In my lab R6 is 3620 with two Ethernet ports and is loaded with the IOS 12.2(37) , here is the error message I am getting out of it
IP ARP: sent req src 204.12.1.6 0010.7b96.c921,
dst 204.12.1.254 0000.0000.0000 Ethernet0/0.263
IP ARP rep filtered src 204.12.1.254 0000.0c09.f442, dst 204.12.1.6 0010.7b96.c921 wrong cable, interface Ethernet0/0.
IP ARP throttled out the ARP Request for 204.12.1.254.
Thanks to you all
Vazman wrote: You can also use dot1q and tag the native vlan traffic using the command.
Switch(config)#vlan dot1q tag native
Of course, ISL seems to be the simpler solution.
HTH
On 9/2/06, srdja blagojevic wrote: Ismail,
my interpretation of your task is:
"All traffic sent over this trunk should be tagged with a VLAN header" =>
use ISL encapsulation
"Do not use Dynamic Trunking protocol over this link" => switchport
nonegotiate
interface fa0/13
switchport trunk encapsulation isl
switchport mode trunk
switchport nonegotiate
HTH,
Srdja
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ismail el-shalh
Sent: Saturday, September 02, 2006 01:50
To: ccielab
Subject: RE: Mock lab 1 : TASK 1.3 (Router on a stick)
The previous task states :
Configure a trunk between Sw1s interface F0/13 and Sw2s interface F0/13
All traffic sent over this trunk should be tagged with a VLAN header
Do not use Dynamic Trunking protocol over this link
SW2-------TRUNK--------SW1------dot1q(native 263)------R6
---------------------------------
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