Re: Dynamips With 3560 Switches

Hi,

I have a 3550 as my breakout switch feeding between my Ubuntu box and a pair
3750s and 3550s. I was recently changing what I have in my set up and my
switch and dynamips configs are the current post at
http://noshut.blogspot.com/

With the 3550 as a breakout switch I am able to see CDP frames from the
3750s and 3550s on my emulated routers but I cant see the routers on the
switches (it's a limitation that I will deal with) due to the l2pt not
working on trunk interfaces
What I did notice is that in my case, if I used 3725s I wouldn't even get
the CDP frames appear on the routers but I would with 7200s

Jack Router - it appears you're using 3725s and having it work successfully,
could you please tell me the make/model of your NIC and which IOS you're
using?

Cheers,
Adam

On Fri, Aug 27, 2010 at 4:26 AM, Jack Router <pan.router_at_gmail.com> wrote:

> Just a thought:
>
> Have you configured vlan support and MTU on your PC ? On my Ubuntu, (no
> GUI,
> no GNS3, only dynamips + dynagen) I run this script before loading .net
> files. I found it on http://21500.net. Your NIC must support higher MTU. I
> found that some older 10/100 nics do not support it.
>
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
> #!/bin/bash
> #############
> # vlansetup.sh
> # http://21500.net
> #############
>
> #### Enable Dot1q support
> modprobe 8021q
>
> #### Set the ethernet MTU
> ifconfig eth1 mtu 1536
>
> #### Create the Vlans
> vconfig add eth1 101
> vconfig add eth1 102
> vconfig add eth1 103
> vconfig add eth1 104
> vconfig add eth1 105
> vconfig add eth1 106
> vconfig add eth1 111
> vconfig add eth1 112
> vconfig add eth1 113
> vconfig add eth1 114
> vconfig add eth1 115
> vconfig add eth1 116
> vconfig add eth1 121
> vconfig add eth1 122
> vconfig add eth1 123
> vconfig add eth1 131
> vconfig add eth1 132
> vconfig add eth1 133
>
> #### Bounce the interface
> ifconfig eth1 down
> ifconfig eth1 up
>
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
>
> Then my router config looks like this:
>
> [[ROUTER R1]]
> autostart = True
> model = 3725
> console = 2001
> slot1 = NM-4T
> s1/0 = FR0 1
> s1/1 = FR0 11
> # f0/0 = SW0 1
> f0/0 = NIO_linux_eth:eth1.101
> # f0/1 = SW0 11
> f0/1 = NIO_linux_eth:eth1.111
> x = -273.0
> y = -1.0
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Anbu
> Sent: 26-Aug-10 14:02
> To: Artem Nedoshepa; mghaynes_at_gmail.com; bhmccie_at_gmail.com; Cisco
> certification
> Subject: Re: Dynamips With 3560 Switches
>
> Hi all ,
> I have tried to make it works , but it is not working .Dynamips config
> is same as above in my first mail.i have changed my 3560 breakout switch
> configuration to :
>
> *Access Ports Connected to 3560:*
>
> interface FastEthernet0/1
> switchport access vlan 101
> l2protocol-tunnel cdp
> no cdp enable
> spanning-tree portfast
>
> *Trunk Port Connected to Dynamips:*
> interface FastEthernet0/15
> switchport trunk encapsulation dot1q
> switchport mode trunk
> l2protocol-tunnel cdp
> no cdp enable
>
> All the Vlans are there in the Breakout switch Vlan Database. When i am
> changing the switchport mode (in the Trunk port of the Breakout SW) it is
> negotiating with the Dynamips server trunk port. So hope Dynamips Server's
> port is working properly as Trunk.
>
> If i enable the Breakout SW fa 0/15 as normal trunk port it can see all the
> Dynamips Routers through CDP. but the Dynamips Routers cannot see any of
> the
> out side real devices and failing to lean the mac of the outside devices
> through ARP.
>
> Can anyone help me find the issue with this....Do i want to change the MTU
> of Server NIC and Switch ?
>
> Regards,
> Anbu
>
>
>
> On Thu, Aug 26, 2010 at 8:09 AM, Anbu <ksanpu_at_gmail.com> wrote:
>
> > Thanks Artem , Michael & Hammer,
> > I have used 3560 as breakout switch
> > for the testing.
> > Yes , i missed to configure the QinQ in the switches . So i will try
> again
> > ,if i need more help i will ask.
> >
> >
> > Regards,
> > Anbu
> >
> >
> > On Thu, Aug 26, 2010 at 12:17 AM, Artem Nedoshepa <
> > artem.nedoshepa_at_gmail.com> wrote:
> >
> >> You won't be able to see CDP packets unless your breakout switch is
> 3750.
> >>
> >> L2 Protocol Tunneling is not supported on Trunk Interfaces on the 3550
> >>
> >> The cheaper solution is to use Quad Nics. You can check my miniblog:
> >> ccie4you.info
> >>
> >>
> >>
> >> On Wed, Aug 25, 2010 at 2:25 PM, Anbu <ksanpu_at_gmail.com> wrote:
> >>
> >>> Hi
> >>> I have tried to connect the 3560 switches with Dynamips with the help
> >>> of
> >>> some old mails in this group.But It is not working . So i need help to
> >>> make
> >>> it success.
> >>>
> >>> * The Connectivity is*
> >>>
> >>> Dynamips SVR -------------0/15 Breakout_SW 0/1---------------0/1
> 3560_SW
> >>> Breakout_Sw 0/15 = Trunk Port
> >>> Breakout_Sw 0/1 = Access Port (Vlan101) = Connected to the 3560
> Switch.
> >>>
> >>>
> >>> .....
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Fri Aug 27 2010 - 09:12:40 ART