From: Chris Hugo (chrishugo@yahoo.com)
Date: Wed Sep 25 2002 - 02:10:46 GMT-3
Are we having fun yet. I am
If you have followed the configuration steps listed in the above sections, and are still not able to ping across the VLANs (between workstation1 and workstation2), then there is a possibility that you have come across a currently open Caveat:CSCds42715, in which the 802.1Q native VLAN keyword does not function properly when fast switching is enabled. You can check the status and brief description of the bug by using the Bug Navigator tool and entering the bug ID. If you find that the bug is fixed, then it is recommended that you use that version of code. For more information on Bug Navigator, see the Tools Information section.
chris hugo --------------well at least it's documented
chris;hugoI>Chris Hugo wrote: Hi All,
I labbed up Steve's issue almost exactly (I used dot1q instead). I had the same problem!
I took out this line and wham-o it worked
switchport trunk native vlan 40 <------extracted from 3550
Yes, my management vlan was still in 40. On my router I had a couple subs 20,40. We don't need this. IS THAT OK?
Now when I trunk to another switch if I leave the line switchport trunk native vlan 40 out and put it in the remote switch my switches refuse to establish a trunk to each other. This one makes cent$
So I read up on this command and I was still confused why does it break one-armed routers? Could it be a bug????? This one does not makes cent$
thanx,
chris hugo
Steve Lown wrote:I am trying to setup a bridge on a router with an isl trunk to a 3550. I
have been asked to set a management interface on the switch on vlan 40, and
I am trying to bridge via IRB on the router between the switch and the
ethenet, vlan 30. I have no connectivity between the switch and the router.
Here are some configs:
switch:
hostname 3550
!
interface FastEthernet0/12
switchport trunk encapsulation isl
switchport trunk native vlan 40
switchport trunk allowed vlan 10,20,30,40,1002-1005
switchport mode trunk
no ip address
!
!
interface Vlan40
ip address 145.1.36.100 255.255.255.0
!
ip default-gateway 145.1.36.6
ip classless
ip http server
!
end
router:
hostname R6
!
bridge irb
!
interface FastEthernet3/0.30
encapsulation isl 30
no ip redirects
bridge-group 1
!
interface FastEthernet3/0.40
encapsulation isl 40
no ip redirects
bridge-group 1
!
interface BVI1
ip address 145.1.36.6 255.255.255.0
!
bridge 1 protocol ieee
bridge 1 route ip
bridge 1 route ipx
!
end
>From: "Balaji Siva"
>To: "Bruce Williams" , "Steve Lown"
>,
>Subject: RE: Mgmt Interface 3550 in separate vlan
>Date: Sat, 21 Sep 2002 17:59:43 -0400
>
>the problem description fro steve for me wasn't clear..but anyway,
>
>all vlans are allowed on a trunk by default so you don't need to make the
>management vlan as native vlan if you don't have to... you can ofcourse
>explictly allow the management vlan on a trunk..
>
>
>B
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Bruce Williams
>Sent: Saturday, September 21, 2002 5:30 PM
>To: Steve Lown; ccielab@groupstudy.com
>Subject: RE: Mgmt Interface 3550 in separate vlan
>
>
>That happened to me too, while I was doing a lab. I made the VLAN of the
>management interface the native VLAN of the trunk so that it would be
>included in VLANs allowed to traverse the trunk.
>
>switch(config-if)#switchport trunk native vlan xx.
>
>It worked for me, but there must be another way.
>
>Bruce
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Steve Lown
>Sent: Saturday, September 21, 2002 3:51 PM
>To: ccielab@groupstudy.com
>Subject: Mgmt Interface 3550 in separate vlan
>
>
>I am trying to set up a practice lab where the management interface is of
>the switch is set in its own vlan and is included in the allowed trunks on
>a
>port to a router. I find when I enter a vlan on a separate vlan from vlans
>that have the command switchport access vlan XX, no connectivity is
>established. The cat5 is easy to setup, you just put the sc0 interface in
>the vlan number you want and set the ip address in the network of the vlan
>you want connectivity. Any suggestions as to how to set this up on the
>3550? Thank you for your input.
>
>
>_________________________________________________________________
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