Configuring A Trunk Port on 2800 ISR

[frivers]

I'm lost here.  I popped open my brand new 2821 ISR router yesterday and went to configure it and something just isn't right.  Half of the commands I'm trying to use aren't available.  So the only recourse I have is to find out what the router can do and then solve the issue I'm having with it.  Here's my issue:

I have a trunk port coming from my ISP's router.  They split the traffic into two VLANS: 360 and 560.  VLAN 560 shoots everything to the Internet and VLAN 360 dumps everything into our MPLS cloud.  I have two gigabit ports (G0/0 and G0/1).  G0/0 will connect to the LAN and G0/1 will be the trunk port.  I need to be able to tag traffic coming off of G0/1 as either VLAN 360 or VLAN 560.  What do I need to do?

[frivers]

Well, I want to see if I can do what I need to do with the software I have.  I do know that I may have to replace the serial card with another LAN card.  Here are the requirements:

• Ethernet trunk port carries dot1q tagged traffic from VLAN 360 and VLAN 560
• 2800 needs to assign VLAN 560 to G0/0 and VLAN 360 to G0/1
• 2800 needs to tag all packets coming out of G0/0 with dot1q 560 and G0/1 with dot1q 360

Currently the config looks like:

interface GigabitEthernet0/0

ip address x.x.x.x 255.255.255.0

vlan-id dot1q 360

duplex auto

speed auto

vlan-id dot1q 560

     exit-vlan-config

interface GigabitEthernet0/1

ip address x.x.x.x 255.255.255.0

duplex auto

speed auto

vlan-id dot1q 360

     exit-vlan-config

Will this do the trick?  The only problem is that my router has a Serial HWIC card when I really need an extra 10/100 card.  It's probably a dumb question, but there's no way I can configure the serial HWIC to just be Ethernet, right?  It's a shot in the dark, but I just need to know before I send it back.  What's a good replacement HWIC for what I need.  I need something with 10/100 ports and relatively inexpensive.

So again, will the config above do what I need it to do?

[Giuseppe Larosa · Accepted solution]

Hello Frank,

the only alternate way would be to add an external LAN switch and to use three ports on it:

port 1  is a trunk carrying vlan 360 and vlan560 and connects to provider

port 2  is an access port in vlan 360 and connects to C2800:g0/0

port 3 is an access port in vlan 560 and connects to C2800:g0/1

you cannot use a serial port as a LAN interface

you could consider to use an HWIC that gives some switch ports like etherswitch module

But I strongly recommend to upgrade the IOS.

you need to go to download SW -> Branch routers - > C2851 - > 12.4T

for example a 12.4 20T2 ip base

http://tools.cisco.com/support/downloads/go/SftAdvisory.x?defAdv=N&sftAdv=Y&filename=c2800nm-ipbasek9-mz.124-20.T2.bin&advUrl=http://www.cisco.com/web/software/DefTracker/280805679/SA/ac104262.html&defInd=N&mdfid=279120798&sftType=IOS+Software&optPla...

you cannot use the link as it is

the first thing to do is to add to your CCO login the service contract of the router in order to be able to download sotfware

Hope to help

Giuseppe

[frivers]

I was afraid of this.  We have a Procurve switch that I guess I can configure the trunk port on.  So I take it my dot1q setups are useless and won't do what I need them to.

Guiseppe, if I use the switch, do I still have to upgrade the IOS to do what I want.

[frivers]

The encapsulate command is available.  Due to my ignorance I couldn't find it.

[Giuseppe Larosa]

Hello Frank,

good news and don't worry these kind of things happen everyday to everyone

Hope to help

Giuseppe