From: Charles Airhienbuwa (airhienbuwa@xxxxxxxxxxxxxxxxx)
Date: Thu Aug 02 2001 - 17:59:19 GMT-3
Fred,
The 255.255.255.255 address is the all-subnet broadcast address.
This is used by older routing protocols like RIP among others.
Your access list is telling the router basically to block any ip packet
with a destination address of 255.255.255.255. Routers that understands
CIDR, it will treat this address (as used in our access-list) as any
other host address.
Charles
At 09:07 PM 8/2/2001, Ademola Osindero wrote:
I am more than surprised at your claim. Do you have
any explanation for the host 255.255.255.255? I am
still dazzled on how host masks really work (for
instance ip add 14.1.2.30 255.255.255.255) and now I
am seeing another one.
--- "SPIKKER,FRED (HP-Netherlands,ex1)"
<fred_spikker@hp.com> wrote:
> Hi all,
>
> When looking at suppress maps for BGP, I ran into an
> ACL-line that I find
> hard to understand (though it works!).
> Can anyone try to explain this to me?
>
> "access-list 110 deny ip any host 255.255.255.255"
>
> I would translate it into english like: "deny from
> any source to a host with
> dest. ip address 255.255.255.255."
>
> Apparently, it should be something like: " deny any
> source with SN mask of
> 255.255.255.255"
>
> I could learn this line by heart for implementing
> suppress maps, but rather
> understand what I'm doing..
>
> So please let me know.
>
> Thanks!
>
> Fred.
> **Please
> read:http://www.groupstudy.com/list/posting.html
>
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