What's sloppy about it ?
Would you prefer the overhead of an acl ?
Please suggest a better way..
But with the AD in there set to 200, it looks like a route
in a "holding pattern" for bgp redistribution.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=66759&t=66755
Either a sloppy way to drop traffic for a /24, or bgp
summarization using null routing.
-Karsten
On Thursday 03 April 2003 07:40 am, Anil Gupte wrote:
> I am trying to understand some IP route commands on our router. Several of
> them go to Null0 - what does that mean?
>
> For example, I have
>
Sloppy!? why??
Dave
Karsten wrote:
> Either a sloppy way to drop traffic for a /24, or bgp
> summarization using null routing.
>
> -Karsten
>
> On Thursday 03 April 2003 07:40 am, Anil Gupte wrote:
>
>>I am trying to understand some IP route commands on our router. Several of
>>them go to
null0 is used as an alternative to access-lists. it is a blackhole. so
anything routed to it gets dropped automatically. an access-list uses more
processor overhead than a null interface and thus if you have a certain part
of your network that you don't want to go anywhere, then use a null
interfac
I'll clarify. On lower end cisco routers not running
bgp, yes, it will save you some cpu cycles. But most
of the routers I'm working on a day to day basis(12Ks, 10Ks, 7200s)
are running full table and hardly get slowed by by acls.
Not to mention the problems a null route (for the purpose
of bit-bu
You are right, it is using BGP. What does summarization do?
Do I need an identical statement for my new Class C?
Thanx,
Anil Gupte
- Original Message -
From: "Karsten"
To: "Anil Gupte" ;
Sent: Thursday, April 03, 2003 10:46 AM
Subject: Re: IP route to Null0?
e: IP route to Null0? [7:66755]
You are right, it is using BGP. What does summarization do?
Do I need an identical statement for my new Class C?
Thanx,
Anil Gupte
- Original Message -
From: "Karsten"
To: "Anil Gupte" ;
Sent: Thursday, April 03, 2003 10:46 AM
Subject:
'd guess.
-Original Message-
From: Anil Gupte [mailto:[EMAIL PROTECTED]
Sent: Friday, 4 April 2003 7:21 AM
To: [EMAIL PROTECTED]
Subject: Re: IP route to Null0? [7:66755]
You are right, it is using BGP. What does summarization do?
Do I need an identical statement for my new Class C?
T
oute dampening in the long run if nothing else :)
>
>
>
>
> -Original Message-
> From: Anil Gupte [mailto:[EMAIL PROTECTED]
> Sent: Friday, 4 April 2003 7:21 AM
> To: [EMAIL PROTECTED]
> Subject: Re: IP route to Null0? [7:66755]
>
>
> You are right, it is using BGP
Not sure what engine line cards you're running on your GSRs, but I've
run into several a problems with ACLs on the GSR platform. It's not
until you get to the E3 ISE or better LC where ACLs are handled
reasonably.
Three problems from memory:
* E0 line cards run the ACLs off the LC CPU and not A
Not sure what engine line cards you're running on your GSRs, but I've
run into several a problems with ACLs on the GSR platform. It's not
until you get to the E3 ISE or better LC where ACLs are handled
reasonably.
Three problems from memory:
* E0 line cards run the ACLs off the LC CPU and not A
You know your GSRs :). Yea I'm running almost all
ISE LCs. For example on a particular one at PAIX that
averages about a half or a Gig during peak on almost
all of my interfaces I have at least some type of acl in both
directions. I only see about 8% cpu useage, hardly any
of which is the ACL (mos
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