From: subodh.rawat@wipro.com
Date: Wed Jul 25 2007 - 03:56:26 ART
Thanks Mounir,
I think this might be the problem because I am using Dynamips, not real
Catalyst 3560 switch.
I have used 3640 router with NM-16ESW in Dynamips.
Can someone confirm (if ever faced this problem) if this is really
because of Dynamips?
Regards
Subodh
________________________________
From: Mounir Mohamed [mailto:mounir.mohamed@gmail.com]
Sent: Wednesday, July 25, 2007 12:20 PM
To: Subodh Singh Rawat (WT01 - TELECOM SERVICE PROVIDER)
Cc: ccielab@groupstudy.com
Subject: Re: Basic switching trunking question..please answer
Dear Subodh,
Am upload your config to 2-3560 with ip routing disabled and everything
working fine
SW1
interface FastEthernet0/7
switchport trunk encapsulation dot1q
switchport mode trunk
interface Vlan5
ip address 5.5.5.1 255.255.255.0
------------------------------------
SW2
interface FastEthernet0/7
end
interface Vlan5
ip address 5.5.5.2 255.255.255.0
sw1#show interfaces tru
Port Mode Encapsulation Status Native vlan
Fa0/7 on 802.1q trunking 1
Port Vlans allowed on trunk
Fa0/7 1-4094
Port Vlans allowed and active in management domain
Fa0/7 1-3,5,9-10,500
sw2#ping 5.5.5.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/8 ms
sw2#exit
[Connection to sw2 closed by foreign host]
sw1#ping 5.5.5.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/9 ms
sw1#
So make sure that the VLAN u working on allowed on the trunk and not
pruned (If pruning enabled)
Best Regards,
Mounir Mohamed
On 7/25/07, subodh.rawat@wipro.com <subodh.rawat@wipro.com> wrote:
Hi Champs,
A basic switching problem I am facing. Please see the diagram
below:
--- f1/7 f1/7 ---
|sw1|--------------------------------|sw2|
--- dot1Q Trunk ---
Switch 1 is VTp Server with domain CISCO
Switch 2 is VTP Client with domain CISCO
port f1/7 is configured as Dot1q encapsulation on both the
switches.
Only one VLAN, i.e. VLAN 3 is added on Sw1 and Same is reflected
in Sw2
too when I see "show vtp status"
and "show vlan brief" command. Please note that this VLAn is not
associated with any physical interface of switch.
When I see "sh int fa1/7 trunk" on both the switches, it shows
as
trunking with dot1q encapsulation.
IP address of VLAn 3 on SW1 is 3.3.3.1/24 while on sw2 is
3.3.3.2/24.
"sh ip int br" also shows up,up for fa1/7 and vlan 3.
I am not able to ping 3.3.3.1 from sw2 and 3.3.3.2 from sw1.
However, I
can ping Ip of own switch, i.e. 3.3.3.2 from sw2 and 3.3.3.1
from sw1.
Can somebody tell me what is wrong with my configuration?
Another good thing is that, when I see "show cdp entry *" from
either
switches, it shows information about other switch. e.g. when I
see "show
cdp entry *" from sw1, it shows IP address of 3.3.3.2 (of sw2)
in its
CDP database. It means layer 2 is working perfect and trunking
is also
perfect. Trunking is working fine can be verified from the
result that
VLAN 3 is present on sw2 which is VTP client for CISCO VTP
domain.
I am not sure why I am not able to ping VLAN 3 IP address of
each other
switches.
My configuration is below:
Sw1
interface FastEthernet1/7
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan3
ip address 3.3.3.1 255.255.255.0
Sw2
interface FastEthernet1/7
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan3
ip address 3.3.3.2 255.255.255.0
CDP output:
sw1#sh cdp entry *
-------------------------
Device ID: sw2
Entry address(es):
IP address: 3.3.3.2
Platform: Cisco 3640, Capabilities: Router Switch IGMP
Interface: FastEthernet1/7, Port ID (outgoing port):
FastEthernet1/7
Holdtime : 128 sec
Version :
Cisco IOS Software, 3600 Software (C3640-IS-M), Version 12.4(8),
RELEASE
SOFTWAR
E (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Mon 15-May-06 16:27 by prod_rel_team
advertisement version: 2
VTP Management Domain: 'cisco'
Duplex: full
Regards
Subodh
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