From: Nicolas Vanderheyden (vanderheyden.nicolas@gmail.com)
Date: Sat Mar 03 2007 - 18:43:08 ART
Sean,
Thank you for putting me back on the right track and for the links.
Victor,
Your example clearly illustrated the theory.
Thanks to both of you.
Nicolas
On 3/3/07, Victor Cappuccio <victor@ccbootcamp.com> wrote:
>
> Nice catch 007 :)
>
> Nicolas, Try this on R5 and R6
>
> conf ter
> router eigrp 1
> redistribute ospf 1 metric 1000 500 255 1 1500
> do clear ip eigrp neigh
>
> on R7
> conf ter
> router eigrp 1
> variance 1
> do clear ip eigrp neigh
> do show ip eigrp topology
>
> And you will see what Sean is talking about
>
> thanks,
> Victor Cappuccio :-
> Network Learning Inc - A Cisco Sponsored Organization (SO) YES! We take
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>
> -----Original Message-----
> From: nobody@groupstudy.com on behalf of Sean C.
> Sent: Sat 3/3/2007 16:11
> To: Nicolas Vanderheyden
> Cc: ccielab@groupstudy.com
> Subject: Re: EIGRP variance
>
> That FD is killing R5's chances. The delay is simply too high on R5's
> link.
>
> Try these 2 links:
> http://www.cisco.com/warp/public/103/19.html
>
> http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094cb7.shtml#feasibleandreported
>
> Variance is only one of two conditions to be met when considering best
> routes:
> "A route is feasible if the next router in the path is closer to the
> destination than the current router *AND* if the metric for the entire
> path
> is within the variance."
>
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_r/rte_eih.htm#wp1002078
>
> HTH,
> Sean
> ----- Original Message -----
> From: "Nicolas Vanderheyden" <vanderheyden.nicolas@gmail.com>
> To: "Sean C." <Upp_and_Upp@hotmail.com>
> Cc: <ccielab@groupstudy.com>
> Sent: Saturday, March 03, 2007 12:41 PM
> Subject: Re: EIGRP variance
>
>
> Here is the ouput:
>
> IP-EIGRP (AS 1): Topology entry for 200.0.0.4/32
> State is Passive, Query origin flag is 1, 1 Successor(s), FD is 2588160
> Routing Descriptor Blocks:
> 192.168.100.6 (FastEthernet0/0), from 192.168.100.6, Send flag is 0x0
> Composite metric is (2588160/2585600), Route is External
> Vector metric:
> Minimum bandwidth is 1000 Kbit
> Total delay is 1100 microseconds
> Reliability is 255/255
> Load is 1/255
> Minimum MTU is 1500
> Hop count is 1
> External data:
> Originating router is 200.0.0.6
> AS number of route is 1
> External protocol is OSPF, external metric is 65
> Administrator tag is 200 (0x000000C8)
> 192.168.100.5 (FastEthernet0/0), from 192.168.100.5, Send flag is 0x0
> Composite metric is (2690560/2688000), Route is External
> Vector metric:
> Minimum bandwidth is 1000 Kbit
> Total delay is 5100 microseconds
> Reliability is 255/255
> Load is 1/255
> Minimum MTU is 1500
> Hop count is 1
> External data:
> Originating router is 200.0.0.5
> AS number of route is 1
> External protocol is OSPF, external metric is 65
> Administrator tag is 200 (0x000000C8)
>
> On 3/4/07, Sean C. <Upp_and_Upp@hotmail.com> wrote:
> >
> > Hi Nicolas,
> >
> > Let's see... on R7, what does a 'show ip eigrp top 200.0.0.4
> > 255.255.255.255' display?
> >
> > Sean #17085
> > ----- Original Message -----
> > From: "Nicolas Vanderheyden" <vanderheyden.nicolas@gmail.com>
> > To: <ccielab@groupstudy.com>
> > Sent: Saturday, March 03, 2007 11:04 AM
> > Subject: EIGRP variance
> >
> >
> > Hello people from the list,
> >
> > I'm trying to do load-balancing with EIGRP by modifying the variance but
> > the
> > end router doesn't seem to enter both routes into its routing table.
> >
> > LAB is as follow:
> >
> > R5 ------ R6
> > \ /
> > \ /
> > \ /
> > R7
> >
> > Both R5 and R6 are redistributing routes learned via OSPF (running above
> > R5
> > and R6) into EIGRP.
> >
> > ####
> > #R5#
> > ####
> > router eigrp 1
> > redistribute ospf 1 metric 1000 500 255 1 1500
> >
> > ####
> > #R6#
> > ####
> > router eigrp 1
> > redistribute ospf 1 metric 1000 100 255 1 1500
> >
> > ####
> > #R7#
> > ####
> >
> > router eigrp 1
> > variance 6 <--- a variance of 2 should have been enough but I tried
> higher
> > values even the max 128 but without success
> > network 192.168.11.4 0.0.0.3
> > network 192.168.100.0
> > network 200.0.0.7 0.0.0.0
> > no auto-summary
> >
> > R7(config-router)#do sh ip protocol
> > Routing Protocol is "eigrp 1"
> > Outgoing update filter list for all interfaces is not set
> > Incoming update filter list for all interfaces is not set
> > Default networks flagged in outgoing updates
> > Default networks accepted from incoming updates
> > EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
> > EIGRP maximum hopcount 100
> > EIGRP maximum metric variance 6
> > Redistributing: eigrp 1
> > EIGRP NSF-aware route hold timer is 240s
> > Automatic network summarization is not in effect
> > Maximum path: 4
> > Routing for Networks:
> > 192.168.11.4/30
> > 192.168.100.0
> > 200.0.0.7/32
> > Routing Information Sources:
> > Gateway Distance Last Update
> > 192.168.100.5 90 00:22:32
> > 192.168.100.6 90 00:22:32
> > 192.168.11.6 90 00:23:48
> > Distance: internal 90 external 170
> >
> > When advertised only from R5:
> >
> > R7(config-router)#do sh ip route 200.0.0.4
> > Routing entry for 200.0.0.4/32
> > Known via "eigrp 1", distance 170, metric 2690560
> > Tag 200, type external
> > Redistributing via eigrp 1
> > Last update from 192.168.100.5 on FastEthernet0/0, 00:00:16 ago
> > Routing Descriptor Blocks:
> > * 192.168.100.5, from 192.168.100.5, 00:00:16 ago, via FastEthernet0/0
> > Route metric is 2690560, traffic share count is 1
> > Total delay is 5100 microseconds, minimum bandwidth is 1000 Kbit
> > Reliability 255/255, minimum MTU 1500 bytes
> > Loading 1/255, Hops 1
> > Route tag 200
> >
> > When advertised from R6 and R5
> >
> > Routing entry for 200.0.0.4/32
> > Known via "eigrp 1", distance 170, metric 2588160
> > Tag 200, type external
> > Redistributing via eigrp 1
> > Last update from 192.168.100.6 on FastEthernet0/0, 00:00:01 ago
> > Routing Descriptor Blocks:
> > * 192.168.100.6, from 192.168.100.6, 00:00:01 ago, via FastEthernet0/0
> > Route metric is 2588160, traffic share count is 1
> > Total delay is 1100 microseconds, minimum bandwidth is 1000 Kbit
> > Reliability 255/255, minimum MTU 1500 bytes
> > Loading 1/255, Hops 1
> > Route tag 200
> >
> >
> > The only way I managed to have both routes into R7 is when having the
> same
> > redistribute metrics on R5 and R6, but of course that was not the idea
> of
> > this lab. I also try to clear my neighbors a few times but I always got
> > the
> > same result
> >
> > I'm probably missing something but I can't figure it out. If you have
> any
> > idea that could help me, that would be great.
> >
> > Nicolas
> >
> > _______________________________________________________________________
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>
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