sub-interfaces are for fast-ethernet interfaces configured for VLANs (one
physical interface, many logical or virtual).
If possible, you should avoid secondary addressing. I have seen networks
with up to 5 IP segments running on a single Ethernet interface (4
secondary addresses). In my
You will have to use secondary addressing.
interface ethernet 0
ip address 10.1.1.1 255.255.255.0
ip address 10.1.2.1 255.255.255.0 secondary
HTH
Darren
At 03:10 PM 12/27/2001 -0500, John Mairs wrote:
Hi,
I have a 2501 (one ethernet interface) and I wanted to
route over that interface by
Hi John.
interface ethernet 0
ip address 192.168.0.1 255.255.255.0
ip address 10.0.0.1 255.0.0.0 secondary
If you are using dynamic routing protocols on the interface, you will also
need to add no ip split-horizon.
Merry New Year.
Ejay
-Original Message-
From: John Mairs
int e0
ip add 1.1.1.1 255.0.0.0
ip add 2.2.2.2 255.0.0.0 secondary
Dave
John Mairs wrote:
Hi,
what will I need to do (specifically if you can) to
route over a single E0 interface?
thanks
--
David Madland
Sr. Network Engineer
CCIE# 2016
Qwest Communications Int. Inc.
[EMAIL
Thank you sir! I appreciate your time on this. one
side though if it's ok, what is the difference between
secondary interfaces and sub-interfaces?
John
--- Darren Crawford wrote:
You will have to use secondary addressing.
interface ethernet 0
ip address 10.1.1.1 255.255.255.0
ip
In a secondary interface, you can have 1 interface with 2 addresses/subnets.
A subinterface is different in that you create multiple interfaces, as
opposed to the 1 in the secondary interface. You do all the addressing by
creating sepreate logical interfaces. These subinterfaces look like
to add a couple of cents worth of observations here, one can have an
undetermined number of secondary addresses on an interface. I used to use
secondaries indiscriminantly when trying to emulate huge networks on a three
router pod. this was before I discovered the joys of loopbacks. We have had
a
John,
You'll need to specify encapsulation isl 100 or encapsulation dot1q 100
depending on what encapsulation type you are using. The 100 is for the vlan
#.
Hope this helps.
Scot
- Original Message -
From: John Mairs
To:
Sent: Thursday, December 27, 2001 12:10 PM
Subject: LAN
If you are going to a Catalyst you can set up the interface as either an
802.1Q or ISL trunk and put as many VLANs across it as you like. Instead of
having to do secondary addresses you simply create subinterfaces. I did
this with my 1751 at home trunking to my 2924XL using 802.1Q encapsulation
Also using VLAN trunking you can place access lists on the various
subinterfaces, as well as NAT...
John Mairs wrote:
Hi,
I have a 2501 (one ethernet interface) and I wanted to
route over that interface by setting up two
sub-interfaces. I can't assign an address because it
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