RE: TTL

From: Tim (ccie2be@nyc.rr.com)
Date: Wed Dec 20 2006 - 13:07:39 ART


Ajar,

I'm pretty sure the TTL is decremented on Ingress. When a router receives a
packet with a TTL of 1, the TTL is decremented making the TTL 0 and causing
the router to send icmp time-exceeded message back.

Please correct me if I'm mistaken.

Thanks, Tim

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Nawaz, Ajaz
Sent: Wednesday, December 20, 2006 5:48 AM
To: Iamgoingtobeaccie Iamgoingtobeaccie; ccielab@groupstudy.com
Subject: RE: TTL

Egress. You can prove it easily through testing.

Hth
Ajaz Nawaz
CCIE#15721

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
sabrina pittarel
Sent: 20 December 2006 06:52
To: Iamgoingtobeaccie Iamgoingtobeaccie; ccielab@groupstudy.com
Subject: Re: TTL

Hi,
let's put it in this way...a router will never forward a packet that has
been received with TTL equal to 0 or 1

Sabrina

----- Original Message ----
From: Iamgoingtobeaccie Iamgoingtobeaccie <heyiamgoingtobeaccie@yahoo.co.in>
To: ccielab@groupstudy.com
Sent: Tuesday, December 19, 2006 5:29:43 AM
Subject: TTL

GS,
          Can someone let me know where does the TTL get
decremented? Is it on the ingress of the receiving router or on the egress
of
the sending router.

          When I configure EBGP between two routers with
their loopback IP addresses and enable 'debug ip packet',I am not seeing any
packet coming in.So I assume that the TTL is decremented on the egress
interface of the sending router.Can someone confirm.

 Send free SMS to your
Friends on Mobile from your Yahoo! Messenger. Download Now!
http://messenger.yahoo.com/download.php



This archive was generated by hypermail 2.1.4 : Tue Jan 02 2007 - 07:50:38 ART