From: ISolveSystems (support@isolvesystems.com)
Date: Mon Jul 30 2007 - 16:15:21 ART
I got it working. There's some serious calculations to get to the ratio...I
set delay of 6000 on R4's eth interface. I then set delay of 21823 on R4 FR
int. And, then delay of 1 and 1 on R1 FR and R5 FR interfaces....
Rack1R4(config-if)#do sh ip route 1.1.1.1
Routing entry for 1.1.1.0/24
Known via "eigrp 100", distance 90, metric 1817600, type internal
Redistributing via eigrp 100
Last update from 174.1.145.1 on Serial1/0, 00:00:24 ago
Routing Descriptor Blocks:
174.1.145.1, from 174.1.145.1, 00:00:24 ago, via Serial1/0
Route metric is 7270400, traffic share count is 1
Total delay is 219240 microseconds, minimum bandwidth is 1544 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 2
* 174.1.45.5, from 174.1.45.5, 00:00:24 ago, via Ethernet0/1
Route metric is 1817600, traffic share count is 4
Total delay is 61000 microseconds, minimum bandwidth is 10000 Kbit
Reliability 255/255, minimum MTU 1500 bytes
Loading 1/255, Hops 1
On 7/30/07, Darren Johnson <dazza_johnson@yahoo.co.uk> wrote:
>
> Heh, how are you. I've actually just set this up on
> Dynagen. The best and easiest way of doing this is to
> only use Delay for the EIGRP metric (change from the
> default via 'metric weight 0 0 0 1 0 0'. Assign a
> delay of 4000 on R4 link to R1 and a delay of 1000 on
> R4 link to R5 (shouldn't have to do the other ends as
> you use the metric from the outgoing interface). What
> you want to see is the EIGRP metric exactly 4 times
> via R1 compared to via R5. 'show ip eigrp topology
> 1.1.1.1 255.255.255.255'
>
> Don't forget the variance 4 command! Give it a try and
> let me know how you go on :-)
>
> --- ISolveSystems <support@isolvesystems.com> wrote:
>
> > Thanks Darren. Should the bandwidth and delay value
> > below be configured on
> > both ends? R1 connection to R4 and R5 is on the
> > same physical S1/0. Thus, I
> > can't specify different delays...
> >
> > Thanks.
> >
> >
> > On 7/30/07, Darren Johnson
> > <dazza_johnson@yahoo.co.uk> wrote:
> > >
> > > Heh, about this. R4 to R5 bandwidth = 100, R4 to
> > R1
> > > bandwidth = 100, and R1 to R5 bandwidth = 100 -
> > this
> > > keeps them the same for ease of calculations.
> > > Then the delay on both ends of R4 to R5 = 1000.
> > The
> > > delay on both ends of link R4 to R1 = 900 and
> > finally
> > > the delay between R1 and R5 = 3100.
> > >
> > > This should allow the R4-R1-R5 path to meet the
> > > feasibility condition. If you then configure the
> > > variance 4 command you should have both paths to
> > route
> > > 1.1.1.1 in the routing table.
> > >
> > > Finally, make sure you have 'traffic-share
> > balanced'
> > > configured, this distributes traffic inversely
> > > proportional to metrics (which in this case you
> > should
> > > have a ratio of 4-1.
> > >
> > > Let me know how you go on.
> > >
> > > Dazzler
> > > --- Herbert Maosa <asawilunda@googlemail.com>
> > wrote:
> > >
> > > > I believe the ratio of the trafic load is
> > > > proportional to the ratio of the
> > > > Metrics. So firstly you would have to scale the
> > > > EIGRP Metrics of the
> > > > Ethernet and Serial links to be 4:1. Then you
> > would
> > > > calculate the variance
> > > > as Variance * Best Metric >= Worst Metric. So
> > > > basically devide the Worst
> > > > metric by the best metric after the scaling of
> > the
> > > > metrics.
> > > >
> > > > Perhaps someone else has a better idea ?
> > > >
> > > > Herbert.
> > > >
> > > >
> > > > On 7/30/07, ISolveSystems
> > > > <support@isolvesystems.com> wrote:
> > > > >
> > > > > Hi Experts,
> > > > > May I know what the best way to figure out
> > what
> > > > variance and delay values
> > > > > I
> > > > > need to use for the following question?
> > > > >
> > > > > Configure the network in such a way that
> > traffic
> > > > from R4 destined to
> > > > > prefixes 1.1.1.0 is load balance out the
> > Ehternet
> > > > link to R5 and the FR
> > > > > link
> > > > > to R1.
> > > > > Traffic should be distributed between the Eth
> > and
> > > > the FR links in a ratio
> > > > > of
> > > > > 4:1.
> > > > >
> > > > > R4 and R5 are connected via Ethernet. R4
> > connects
> > > > to R1 via FR. R1
> > > > > connects
> > > > > to R5 via FR. FR connections use physical
> > > > interfaces.
> > > > >
> > > > >
> > > > > R4
> > > > > | \
> > > > > | \
> > > > > | R1
> > > > > | /
> > > > > | /
> > > > > R5
> > > > > |
> > > > > Net 1.1.1.1
> > > > >
> > > > >
> > > >
> > >
> >
> _______________________________________________________________________
> > > > > Subscription information may be found at:
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> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > > Kindest regards,
> > > > hm
> > > >
> > > >
> > >
> >
> _______________________________________________________________________
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> > > >
> > >
> > >
> > >
> > >
> >
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This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:42 ART