You've really only got a few options available:
(1) Proxy ARP
(2) ICMP Redirects
(3) ICMP Router Discovery Protocol
(4) Run a routing protocol on the workstations
(5) Hot Standby Router Protocol
Of these, (4) is probably the least desirable, (3) is the least widely
supported and (5), as you
A couple of more thoughts on the issue of ICMP redirects.
First, Edward Solomon had a pretty good concise analysis of the
options available in the environment you have and the
advantages and disadvantages to each:
(1) Proxy ARP
(2) ICMP Redirects
(3) ICMP Router Discovery Protocol
(4)
You can use the command 'no ip redirects' command on
the Interface configuration mode.
Muhammad Khalilulah
CCNP, MCSE
--- John Neiberger [EMAIL PROTECTED]
wrote:
When a host receives an ICMP redirect, it's my
understanding that it
places a host route in the routing table for that
I simply left them alone.
Dale
[=`)
From: Priscilla Oppenheimer [EMAIL PROTECTED]
Reply-To: Priscilla Oppenheimer [EMAIL PROTECTED]
To: Paul Werner [EMAIL PROTECTED],"[EMAIL PROTECTED]"
[EMAIL PROTECTED]
Subject: Re: ICMP redirects
Date: Mon, 09 Oct 2000 13:00:11 -0700
At 01:
On Mon, 09 Oct 2000, Priscilla Oppenheimer
([EMAIL PROTECTED]) wrote:
What does it mean to plumb host routes? I couldn't decode what
Microsoft is attempting to say in this article. If you can
explain it, that would be great. (The other articles did make
sense. Thanks for the URLs.)
I
On 9 Oct 2000 16:04:13 -0400, Priscilla Oppenheimer [EMAIL PROTECTED] wrote:
:At 01:59 AM 10/9/00, Paul Werner wrote:
:
:Listed above is what the Internet Standard specifies for proper
:operation. Let's bounce that against reality as we know it:
:
Well, it's true, there is really no way for them to know that the link came
back up. However, depending on the host, there is also no guarantee that
they will ever heed the redirect in the first place. You really cannot count
on them for fault tolerance.
An HSRP solution would probably work
HSRP didn't even occur to me, but since the DSL router we're using is a 675
that can't do HSRP, that isn't even an option. Bummer! That would have
worked very well in this situation.
Thanks
John
Well, it's true, there is really no way for them to know that the link
came
back up.
I think HSRP could really handle this well - but with redirect - I haven't tried this,
but... :
static route out T1, floating static to other router, so it is only in the route table
when the T1 goes down, if it sends out the same interface it will forward the
packet send back ICMP redirect.
You could install different metric's in the routing tables so that if the
T-1 comes backup that route will be used
Duck
- Original Message -
From: John Neiberger [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, August 29, 2000 11:23 AM
Subject: ICMP Redirects
We have a situation
I understand your point, but our primary reason for having a backup line is
in case the main circuit goes down, not in case the actual router goes down.
I was attempting to figure out a way to do poor-man's HSRP. For DSL, we'll
be using a Cisco 675 which can't do HSRP.
Thanks,
John
On Tue,
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