I would swear that I read that "secondary" was eventually going away
and the sub-interfaces would replace it.
Am I dreaming?
-------------------------------------------------
Tks | <mailto:[EMAIL PROTECTED]>
BV | <mailto:[EMAIL PROTECTED]>
Sr. Technical Consultant, SBM, A Gates/Arrow Co.
Vox 770-623-3430 11455 Lakefield Dr.
Fax 770-623-3429 Duluth, GA 30097-1511
=================================================
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of
Priscilla Oppenheimer
Sent: Monday, February 19, 2001 10:33 PM
To: [EMAIL PROTECTED]
Subject: Re: Creating Multiple Interfaces on an Ethernet Port
At 04:47 PM 2/19/01, Chris Wornell wrote:
>Hello,
>
>I've found out you can't create multiple interfaces on an ethernet port
>apparently. I was wondering why this is exactly? I know you can
accomplish
>the same on serial lines using pvc's but it seems odd you can't do it
on
>ethernet.
Why do you want to create multiple interfaces on your Ethernet port?
Ethernet was designed as a connectionless, packet-switched shared
network.
Serial links, on the other hand, are more often used for
connection-oriented virtual circuits. Subinterfaces let you associate a
single physical link with multiple virtual circuits.
> I know there are ethernet only networks and the ip secondary
>command doesn't seem right compared to creating a new interface.
Sure there are Ethernet-only networks. Each physical Ethernet port on a
router is usually associated with an IP subnet. If you happen to have
two
IP subnets on the LAN to which a physical port is attached, you could
use a
secondary IP address as a workaround to this problem. Traffic between
subnets would still go through the router usually.
If you're using your Ethernet port as a "trunk port," and you use ISL or
802.1q VLAN encapsulation, then you can configure subinterfaces. In this
case, subinterfaces let you associate a single physical link with
multiple
VLANs. Inter-Switch Link (ISL) and IEEE 802.1q maintain VLAN
identification
information as traffic travels between connected switches.
Maybe you can give us a better idea of what you are trying to accomplish
and we can provide more tailored information, but I hope this info was
somewhat useful.
Priscilla
>Chris Wornell
>Technical Support
>MM Internet http://mminternet.com
>888-654-4971
>CCNA, CCDA, CSE
>
>_________________________________
>FAQ, list archives, and subscription info:
>http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
________________________
Priscilla Oppenheimer
http://www.priscilla.com
_________________________________
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_________________________________
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