VLAN configuration

[mohamdr]

I am trying to configure interVLAN and getting I have 1 Ethernet port in the router , so I am configuring subinterface for each vlan

also I am configuring
Encapsulation dotlq in each subinterface and giving no shutdown.

on switch port where router get connected I have configured it as trunk port and also i have enabled encapsulation to dotlq .

but still for each subinterface I am getting Protocol is down?

why the protocol geeting down?

 

[AJ1982]

Can you post the configs...

===

Fatman Superstar (Andrew James)

CCNA

 

[burtsbees]

On the main interface itself, you do the no shutdown command, not on the subinterfaces. Also, intervlan routing can occur only on a fastethernet interface (100MBps, not 10 MBps), but I am sure this is not the case here.

Burt

 

[Minue]

Not to contradict you Burtsbees.But just for information!The Cisco 2610 with right IOS can suport Intervlan routing.
Regards

 

[globalchicken]

He was just saying that you could be limited on a 10 Mbps link using intervlan routing. If he was able to input the command with no errors than his IOS supports that feature.

I second the no shut on the physical interface, but if he is only getting protocol down then I would think that the port status would be up and not admin shut.

If you could post configs, we could possibly help further!

 

[burtsbees]

Yes, that is what I was saying, sorry.
He states he is getting line protocol down on the subinterfaces, which he will get unless he puts the no shut command on the main interface. The proper config will go something like this...
router(config)#int fa0/0
router(config-if)#no shut
router(config-if)#int fa0/0.1
router(config-subif)#encap dot1q 1
router(config-subif)#ip add 10.1.1.69 255.0.0.0
router(config-subif)#^z
router#
Like that. Good luck.

Burt

 

[robertjo24]

Minue,

What IOS will support inter-VLAN routing for the 2610/2611 platform?

Would the IOS have greater memory requirements over the standard IP IOS?

Also, why are the interfaces on routers default to a shutdown state?

 

[Minue]

Hello robertjo24
You will need an IOS like 12.3 IP plus with 16MB flash and 48 dram.
Routers are normally ship like that I think partly for security reason,but things are changing a bit.Some 800 series are ship with the inteface eth0 in the turn-on state,to allow a easy web-setup.I also have situations where some of cisco IOS will look for configuration files from tftp-server and cisconet.
Regards

 

[octavian10]

The 2610 or 2611 which come with ethernet interfaces cannot do inter vlan routing because you cannot trunk on an ethernet ports, it needs to be fast-ethernet. You need to use somthing like the 2620 or 2621 series routers to accoplish this.
Have a good day.

"I hear and I forget. I see and I remember. I do and I understand."
- Confucius (551 BC - 479)

 

[burtsbees]

That is what I thought, which confirms what I said before. Thanks octavian.

Burt

 

[Minue]

Hello Burtbees and octavian10
We are all here to improve our knowledge.And I wouln't write misleading information "just to add my 2 cents" .It's fully documented on cisco website,if I can find the link again I will post it.And I have tested it and it works 100%.If yo want to ignore good info it up to you!
Regards

 

[octavian10]

A maxed out, proper IOS, 2610/2611 will trunk! Sorry about that! I have read so many times (in Cisco books) that you cannot trunk 10mbs ethernet ports I just assumed it true, guess what happens when you assume. Once again sorry for the bad post.
Have a good day.

"I hear and I forget. I see and I remember. I do and I understand."
- Confucius (551 BC - 479)

 

[burtsbees]

oh boy...now what do I say?
Actually, I read the same thing, I thought. I know I was told that a 2500 series cannot trunk, and I thought it was because of the fact it was 10MBps...oh well.

Burt

 

[helpdeskdan]

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801429fb.shtml

"There are several types of Ethernet interfaces that support ISL trunking. The 10BASE-T (common Ethernet) ports do not support trunking, while most 100BASE-T (Fast Ethernet) ports do support trunking."

If there is a document on Cisco's website that states anything to the contrary, it must be quite well hidden. I have heard rumors about it working despite this, hence I won't disclaim it.

 

[Minue]

Hello
As I said before "I wouln't write misleading information".Here's the link!!!

http://www.cisco.com/en/US/products/hw/routers/ps259/prod_bulletin09186a00800921e4.html

Regards
Ps.As they say "you learn something everyday

 

[burtsbees]

He got us there helpdeskdan...

I read both links, and the second states that before 12.2, 802.1q was limited to 100MBps fastethernet interfaces, but this release makes it possible on 10MBps ethernet interfaces on the 2610 and 2611 platforms. i stand corrected, and I apologize, Minue. Thanks for the info.

Burt

 

[helpdeskdan]

I never disclaimed Minue, I only said I was unable to find the documentation. Even if I had, being proved wrong, if one sets aside the foolish emotion of pride, can be a most effective means of learning. I thank Minue for sharing information. And, I applaud those who have made this thread a learning experience rather than a flame.

 

[burtsbees]

Be a man and apologize, for cryin' out loud...talk about pride!

Burt

 

[helpdeskdan]

LOL! Ok, Burt, I apologize for saying Minue might be right when I said, "I have heard rumors about it working despite this, hence I won't disclaim it." Anybody remember the problem we were trying to fix now? ;-)

 

[burtsbees]

Touche...lol. I admit---I really only heard what you have heard as well, helpdeskdan, as far as 10MBps not being able to support 802.1Q, no matter what platform. This is definitely marked as something I learned. Thanks to all for that. Take care, guys.

Burt