RE: Dynamips With 3560 Switches

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
Received on Thu Aug 26 2010 - 14:26:43 ART