From: Peter Kingston (kingstonp.ccie@gmail.com)
Date: Wed Jul 25 2007 - 10:41:45 ART
We had problems with 3745's and 3845's in our real network which is most
likely related.
Ip traffic would only work on this first module that the router loaded, the
routers didn't support 2 fast ethernet modules
Needed to buy additional 1 gig expansion slots for the 2 modules and loop
them with the following configuration:
interface GigabitEthernet1/0
switchport mode trunk
switchport stacking-partner interface GigabitEthernet3/0
interface GigabitEthernet3/0
switchport mode trunk
switchport stacking-partner interface GigabitEthernet1/0
I wouldn't expect to see anything like this in the lab.
Regards,
Peter Kingston
Studying for CCIE
On 7/25/07, Mounir Mohamed <mounir.mohamed@gmail.com> wrote:
>
> Am totally aggree witht the guy because when i test the same
> configurations
> on dynamips with only one module everything working fine.
>
> On 7/25/07, Ben Holko <ben.holko@datacom.com.au> wrote:
> >
> > I lost hours on the "two switch modules" problem in Dynamips - drop your
> > Dynamips config to one switching module per router
> >
> >
> >
> > Ben Holko
> > Snr. Network Architect - Datacom Systems - L2 190 City Road South
> > Melbourne Victoria 3205, Australia
> > Email: ben.holko@datacom.com.au - Ph: +61-3-9626 9627 - fax: +61
> > -3-9626 9699 - Mob: +61-412 484 456
> >
> >
> > ________________________________
> >
> > From: nobody@groupstudy.com on behalf of subodh.rawat@wipro.com
> > Sent: Wed 7/25/2007 8:22 PM
> > To: elektronikadam@yahoo.com; ccielab@groupstudy.com
> > Subject: RE: Basic switching trunking question..please answer
> >
> >
> >
> > I am using curently two. I think this might be one of the culprit. Will
> > share with u tomorrow.
> >
> > But still, if this the root cause of problem, then does any one has
> > solution for it?
> >
> > Regards
> > Subodh
> >
> > -----Original Message-----
> > From: ahmet seckin [mailto:elektronikadam@yahoo.com]
> > Sent: Wednesday, July 25, 2007 3:44 PM
> > To: Subodh Singh Rawat (WT01 - TELECOM SERVICE PROVIDER);
> > ccielab@groupstudy.com
> > Subject: Re: Basic switching trunking question..please answer
> >
> > Hi Subodh,
> >
> > How many NM-16ESW did you use on your dynamips routers? If you use 2 of
> > them on a router, dynamips will have problems with vlans, so try it with
> > using only one.
> > I hope this helps.
> >
> > Regards,
> >
> > Kerim
> >
> >
> > ----- Original Message ----
> > From: "subodh.rawat@wipro.com" <subodh.rawat@wipro.com>
> > To: djerk@djerk.nl; tohsoon28@gmail.com
> > Cc: ccielab@groupstudy.com
> > Sent: Wednesday, July 25, 2007 9:59:50 AM
> > Subject: RE: Basic switching trunking question..please answer
> >
> >
> > Few more outputs:
> >
> > sw1#sh spanning-tree vlan 3
> >
> > VLAN3 is executing the ieee compatible Spanning Tree protocol
> > Bridge Identifier has priority 32768, address cc06.0df4.0001
> > Configured hello time 2, max age 20, forward delay 15
> > We are the root of the spanning tree
> > Topology change flag not set, detected flag not set
> > Number of topology changes 1 last change occurred 00:59:20 ago
> > from FastEthernet1/7
> > Times: hold 1, topology change 35, notification 2
> > hello 2, max age 20, forward delay 15
> > Timers: hello 1, topology change 0, notification 0, aging 300
> >
> > Port 48 (FastEthernet1/7) of VLAN3 is forwarding
> > Port path cost 19, Port priority 128, Port Identifier 128.48.
> > Designated root has priority 32768, address cc06.0df4.0001
> > Designated bridge has priority 32768, address cc06.0df4.0001
> > Designated port id is 128.48, designated path cost 0
> > Timers: message age 0, forward delay 0, hold 0
> > Number of transitions to forwarding state: 1
> > BPDU: sent 1784, received 0
> >
> > sw2#sh spanning-tree vl 3
> >
> > VLAN3 is executing the ieee compatible Spanning Tree protocol
> > Bridge Identifier has priority 32768, address cc07.0580.0001
> > Configured hello time 2, max age 20, forward delay 15
> > Current root has priority 32768, address cc06.0df4.0001
> > Root port is 48 (FastEthernet1/7), cost of root path is 19
> > Topology change flag not set, detected flag not set
> > Number of topology changes 0 last change occurred 00:58:48 ago
> > Times: hold 1, topology change 35, notification 2
> > hello 2, max age 20, forward delay 15
> > Timers: hello 0, topology change 0, notification 0, aging 300
> >
> > Port 48 (FastEthernet1/7) of VLAN3 is forwarding
> > Port path cost 19, Port priority 128, Port Identifier 128.48.
> > Designated root has priority 32768, address cc06.0df4.0001
> > Designated bridge has priority 32768, address cc06.0df4.0001
> > Designated port id is 128.48, designated path cost 0
> > Timers: message age 2, forward delay 0, hold 0
> > Number of transitions to forwarding state: 1
> > BPDU: sent 0, received 1752
> >
> >
> > sw1#sh ip arp vlan 3
> > Protocol Address Age (min) Hardware Addr Type Interface
> > Internet 3.3.3.2 0 Incomplete ARPA
> > Internet 3.3.3.1 - cc06.0df4.0000 ARPA Vlan3
> >
> >
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > > Of Toh Soon, Lim
> > > Sent: woensdag 25 juli 2007 7:34
> > > To: subodh.rawat@wipro.com
> > > Cc: ccielab@groupstudy.com
> > > Subject: Re: Basic switching trunking question..please answer
> > >
> > > Hi Subodh,
> > >
> > > Your configs look fine to me. This simple setup should work without
> > > issue.
> > >
> > > Anyway, can you provide us outputs of the following commands:
> > >
> > > - sh ip arp vl 3
> > > - sh spann vl 3
> > > - sh int status
> > > - sh int trunk
> > >
> > >
> > > Thank you.
> > >
> > > B.Rgds,
> > > Lim TS
> > >
> > >
> > > 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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>
> --
> Best Reagrds,
> Mounir Mohamed
>
> _______________________________________________________________________
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-- Regards,Peter Kingston Studying my CCIE
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