EIGRP uses minimum bandwidth and total delay to compute metric (at lest in
its
default configuration).
I'm a little bit confused: delay of each interface is inversely proportional
to the configured interface bandwidth, so It seems that EIGRP metric is
affected only by configured bandwidth (f(bandwidth)+ sum of
f(1/bandwidth)):
is this correct?
Please give a look to the following output.
I see in the first subinterface BW 3264 and in the second one BW 2544, but
the
same DLY value: 80.
Rome-7206vxr#sh int atm2/0.1
ATM2/0.1 is up, line protocol is up
Hardware is ENHANCED ATM PA
Description: "P-to-P PVC with Milan"
Internet address is 213.x.y.14/30
MTU 4470 bytes, BW 3264 Kbit, DLY 80 usec,
reliability 255/255, txload 1/255, rxload 4/255
Encapsulation ATM
0 packets input, 0 bytes
0 packets output,0 bytes
99302 OAM cells input, 99302 OAM cells output
Rome-7206vxr#sh int atm2/0.2
ATM2/0.2 is up, line protocol is up
Hardware is ENHANCED ATM PA
Description: "P-to-P PVC with London"
Internet address is 213.x.y.74/30
MTU 4470 bytes, BW 2544 Kbit, DLY 80 usec,
reliability 255/255, txload 1/255, rxload 4/255
Encapsulation ATM
0 packets input, 0 bytes
0 packets output,0 bytes
99121 OAM cells input, 99121 OAM cells output
You suggest " you can tweak the interface bandwidth" and my english is
awful:
what does it mean?
Thank you and have a nide day to all,
Teresa
Teresa Presutto
Grapes Italia S.p.A.
Italy Network Development
Via Chiana, 1 - 00198 Rome (Italy)
Tel +39 06 84550.1, fax +39 06 84550.640, mobile +39 348 4719450
----- Original Message -----
From: Priscilla Oppenheimer
To: [EMAIL PROTECTED]
Sent: Monday, September 24, 2001 9:41 PM
Subject: Re: delay and delay [7:20926]
With ping, delay is actually measured. The router reports how long it takes
to get replies.
EIGRP delay is not dynamically measured. Delay of each interface is
inversely proportional to the configured interface bandwidth. Total delay
for an EIGRP route is a sum of each interface delay, as reported in EIGRP
Updates.
If you want EIGRP's delay to be somewhat more realistic, you can tweak the
interface bandwidth.
Priscilla
At 02:06 PM 9/24/01, TP wrote:
>Group,
>what is the relation (if any) between the total delay I see in sh ip eigrp
>topology and the total delay I see in a simple ping?
>
> From show eigrp topology I see total delay associated to a point-to-point
atm
>pvc lower than total delay showed for a E1 hdlc (between the same routers,
1
>hop).
>If a make an extended ping I experience a lower delay with E1 than pvc atm
>(and, to be honest, this is what I'd like to see)
>
>
>Thanks in advace,
>Teresa
________________________
Priscilla Oppenheimer
http://www.priscilla.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=20972&t=20926
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