From: Daniel Kutchin (daniel@kutchin.com)
Date: Tue Jan 27 2009 - 08:31:11 ARST
To add to Azmat's post, RFC1858 is nice to read:
http://www.internetworkexpert.com/rfc/rfc1858.txt
Non-initial packets have non-zero fragment offset field.
(deb ip packet de)
...
433: IP: s=10.1.4.4 (Ethernet0/0), d=10.1.4.14 (Ethernet0/0), len 1500, rcvd
3
433: IP Fragment, Ident = 10, fragment offset = 0 <- initial packet
...
437: IP Fragment, Ident = 10, fragment offset = 1480 <- non-initial
packet
Ping an interface with a large packet size(say,1600), after applying the
the access-list below. It will generate the following line
279: ICMP type=11, code=1 <- fragment reassembly time exceeded
ip access-list extended acl-block-fragments-in
deny ip any any fragments log
permit ip any any
-
Daniel
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Azmat Marwat
Sent: Dienstag, 27. Januar 2009 08:05
To: olumayokun fowowe
Cc: Cisco certification
Subject: Re: Non-initial and Fragmented packets
I think if a packet is fragmented, the first segment is initial segment and
all the rest are non-initials.
Azmat Khan
On Mon, Jan 26, 2009 at 11:45 PM, olumayokun fowowe
<olumayokun@gmail.com>wrote:
> Hi,
>
> Please what is the difference between non-inital and fragmented packets?
>
> Thanks,
>
> 'Mayokun
>
>
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