From: Jonathan V Hays (jhays@jtan.com)
Date: Mon Aug 25 2003 - 00:56:22 GMT-3
Hi Emad,
The config you posted does not show dot1q configured. It shows ISL
encapsulation on both switches. So I guess you are saying that you have
changed the config but you have not yet posted the update, correct?
What I was talking about is that in your original post, you have
configured 20.1.1.1 as the IP address of SVI Vlan2.
And a few lines later you configure a default-gateway with the same IP
address (20.1.1.1).
This excerpt below is from your original post:
interface Vlan1
no ip address
shutdown
!
interface Vlan2
ip address 20.1.1.1 255.255.255.0
interface Vlan3
ip address 30.1.1.1 255.255.255.0
!
ip default-gateway 20.1.1.1
I think the problem is that you don't want the native vlan (2) and the
SVI on the same vlan.
HTH
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
emad
Sent: Sunday, August 24, 2003 11:19 PM
To: 'Jonathan V Hays'
Cc: ccielab@groupstudy.com
Subject: RE: Cat3550: strange problem
Jonathan,
I changed the encapsulation to DOT1Q
And I changed the native VLAN because I want the untagged traffic to go
as vlan 2 traffic as it is connected to the DOWN-SW which is carrying
only traffic of vlan 2.
I think I do need the gateway on the L3 switch (UP-SW) but I don't
understand ur words about
" On UP-SW, you certainly don't want your own IP address configured as
the default gateway, as you have done below."
Because I only configured one gateway!!!!
Simply I need DOWN-SW to e able to Ping the vlan 3 interface IP which is
30.1.1.1
Can u help me in this!!!
BTW , I removed the gateway from the UP-SW without any effect
Regards
-----Original Message-----
From: Jonathan V Hays [mailto:jhays@jtan.com]
Sent: Sunday, August 24, 2003 9:24 PM
To: 'emad'
Cc: ccielab@groupstudy.com
Subject: RE: Cat3550: strange problem
On UP-SW, you certainly don't want your own IP address configured as the
default gateway, as you have done below.
If it is a simple design, why are you changing the native vlan?
And I think that native vlan is for dot1q and has no effect on isl.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
emad
Sent: Sunday, August 24, 2003 1:24 PM
To: ccielab@groupstudy.com
Subject: Cat3550: strange problem
Folks,
I have a very simple design I configured it many times before but now
suddenly it is not working ,
I have two 3550 switches and I'm just trying to have them working as one
contain only vlan 2 (as edge switch) and the other one have another vlan
(vlan 3) but acting as Layer3 which routes between the two vlans , u
will find below the configurations of the two switches and as a test I
tried to ping from the down switch to the up switch vlan 3 interface but
no ping at all which lead to If I connected two PCs to these two
different vlans , I can't ping too
!
interface FastEthernet0/1
switchport trunk encapsulation isl
switchport trunk native vlan 2
switchport mode trunk
!
interface FastEthernet0/15
switchport access vlan 3
switchport mode dynamic desirable
!
interface Vlan1
no ip address
shutdown
!
interface Vlan2
ip address 20.1.1.1 255.255.255.0
interface Vlan3
ip address 30.1.1.1 255.255.255.0
!
ip default-gateway 20.1.1.1
ip classless
ip http server
!
!
UP-SW#sh ip in br
Interface IP-Address OK? Method Status
Protocol
Vlan1 unassigned YES NVRAM administratively
down down
Vlan2 20.1.1.1 YES NVRAM up
up
Vlan3 30.1.1.1 YES NVRAM up
up
FastEthernet0/1 unassigned YES unset up
up
FastEthernet0/15 unassigned YES unset up
up
--------------------------------------------------------------
!
hostname Down-Back
!
!
interface FastEthernet0/1
switchport trunk encapsulation isl
switchport trunk native vlan 2
switchport mode trunk
!
!
interface FastEthernet0/9
switchport access vlan 2
switchport mode dynamic desirable
!
!
interface Vlan2
ip address 20.1.1.2 255.255.255.0
!
ip default-gateway 20.1.1.1
ip classless
ip http server
!
!
Down-Back#sh ip in br
Interface IP-Address OK? Method Status
Protocol
Vlan2 20.1.1.2 YES manual up
up
FastEthernet0/1 unassigned YES unset up
up
FastEthernet0/9 unassigned YES unset up
up
Regards
This archive was generated by hypermail 2.1.4 : Tue Sep 02 2003 - 18:54:06 GMT-3