From: Richard Dumoulin (richard.dumoulin@vanco.es)
Date: Sun Aug 01 2004 - 15:10:39 GMT-3
I just tried it. When the vlan is not native on my 2600 ethernet interface
it works:
Rack05R4#sh run int eth 0/0.100
Building configuration...
Current configuration : 90 bytes
!
interface Ethernet0/0.100
encapsulation dot1Q 100
ip address 100.1.1.4 255.0.0.0
end
Rack05R4#pi 100.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 100.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/4 ms
But when I change it to native it stops working:
Rack05R4#sh run int eth 0/0.100
Building configuration...
Current configuration : 97 bytes
!
interface Ethernet0/0.100
encapsulation dot1Q 100 native
ip address 100.1.1.4 255.0.0.0
End
Rack05SW1#sh run int fa 0/2
Building configuration...
Current configuration : 157 bytes
!
interface FastEthernet0/2
description connected to R4
switchport trunk encapsulation dot1q
switchport trunk native vlan 100
switchport mode trunk
End
Rack05SW1#sh cdp nei | in R4
Rack05R4 Fas 0/2 122 R 2610 Eth 0/0
This is why I think it is a bug on the ethernet interface of the 26000,
isn't it ?
--Richard
-----Original Message-----
From: Adel Abouchaev [mailto:adel@netmasterclass.net
<mailto:adel@netmasterclass.net> ]
Sent: domingo, 01 de agosto de 2004 18:03
To: Pankaj Bhagwanani
Cc: ccielab@groupstudy.com
Subject: Re: Native Vlan Help
Is your switch in vtp transparent or vtp server mode? Do "sh vlan brief"
and check if vlan is created. Also you may want to send the output of
"show interface trunk" and "show vlan brie"
for people of the GroupStudy to check for possible problems. Can you
ping the SVI interface from either router? If you can't, do you have arp
entry installed on router or is it pending? Also you may
want to test cables .. :) I better stop now :)))
Cheers,
Adel Abouchaev
CCIE#12037
Netmasterclass LLC
Pankaj Bhagwanani wrote:
>Hello
>
>I am wondering if someone can help
>
>from my curent understanding the native vlan has to be the same on each
>side of the trunk.
>
>is this topoplgy posible
>
>R4 --- Sw1 --- R1
>
>on R1
>
>!
>interface Ethernet0/0
>no ip address
>half-duplex
>!
>interface Ethernet0/0.1
>encapsulation dot1Q 6 native
>ip address 10.10.10.1 255.255.255.0
>!
>interface Ethernet0/0.2
>encapsulation dot1Q 26
>ip address 10.10.11.1 255.255.255.0
>!
>
>on S1
>
>!
>interface FastEthernet0/1
>description connection to R1
>switchport trunk encapsulation dot1q
>switchport trunk native vlan 6
>switchport mode trunk
>no ip address
>!
>interface FastEthernet0/5
>description connection to R4
>switchport access vlan 6
>switchport mode access
>no ip address
>!
>interface Vlan6
>ip address 10.10.10.2 255.255.255.0
>!
>
>on R4
>
>!
>interface Ethernet0
>ip address 10.10.10.3 255.255.255.0
>!
>
>I can not ping from R1 to R4...or R1 to vlan 6 on S1....any ideas
>How do i attach more hosts/routers to vlan 6 successfully ?
>
>Best Regards
>Pankaj
>
>
>
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