From: Herbert Maosa (asawilunda@googlemail.com)
Date: Mon Jan 07 2008 - 04:28:03 ARST
Right Eric, this makes sense now. Thanks all.
Herbert.
On Jan 7, 2008 6:25 AM, Scott Vermillion <scott_ccie_list@it-ag.com> wrote:
> Hi Herbert,
>
>
> I think you're correct. If you just do 'sh ip eig top' you will not see
> non-feasible successors unless you use the 'all-links' keyword. However,
> you displayed the topology for a specific prefix, which give you everything
> the router's got for it. Sorry, I didn't realize exactly where the
> confusion was
>
>
> Regards,
>
> Scott
>
>
>
>
>
> *From:* Herbert Maosa [mailto:asawilunda@googlemail.com]
> *Sent:* Sunday, January 06, 2008 11:21 PM
> *To:* Scott Vermillion
> *Cc:* Eric Leung; Cisco certification
>
> *Subject:* Re: EIGRP Feasibility Condition
>
>
>
> Perhaps let me re-phrase the question. Should that route be visible
> through *show ip eigrp topology ? *I definitely agree it will be in the
> topology table as it is being learnt, but I believed until it passes the
> feasibility condition it should not be listed by way of this command as
this
> command supposedly lists only feasible successors and successors.
>
> Herbert.
>
> On Jan 7, 2008 6:17 AM, Scott Vermillion <scott_ccie_list@it-ag.com>
> wrote:
>
> Hey Eric,
>
> Looking at the addressing scheme and the delay values (as well as a few
> fields in the topology table entries), it looks like R5 connects to R4
> directly via Fast-E and also via FR hub-and-spoke cloud, with R1 being the
>
> hub. R5 is redistributing this external network learned via RIP from a
> BB.
> R1 is advertising its route via the FR could on down to R4, which happens
> to
> have a much better metric via the Fast-E connectivity. Both paths are
> supposed to be in the topology table - just not the routing table. In
> fact,
> if we looked at the R1 topology table, it would show two paths as well,
> and
> the path via R4 and on up to R5 via Fast-E would also not meet the
> feasibility condition but would nevertheless still be in the topology
> table
> of R1.
>
> Regards,
>
> Scott
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Eric
> Leung
> Sent: Sunday, January 06, 2008 11:01 PM
> To: Herbert Maosa
> Cc: Cisco certification
> Subject: Re: EIGRP Feasibility Condition
>
> Hi Herbert,
>
> would you mind post the configuration?
>
> eric.
>
> 2008/1/7, Herbert Maosa < asawilunda@googlemail.com>:
> >
> > It could be very early in the morning and I probably am missing
> something
> > fundamental here. Look at the output below. Shouldn't the highlighted
> path
> > be excluded from the EIGRP topology table based on failing the
> feasibility
> > condition according to the current feasible distance ?
> >
> >
> > sh ip eigrp topo 222.22.2.0
> > IP-EIGRP (AS 1024): Topology entry for 222.22.2.0/24
> > State is Passive, Query origin flag is 1, 1 Successor(s), FD is 30720
> > Routing Descriptor Blocks:
> > 174.1.45.5 (FastEthernet0/1), from 174.1.45.5, Send flag is 0x0
> > Composite metric is (30720/28160), Route is External
> > Vector metric:
> > Minimum bandwidth is 100000 Kbit
> > Total delay is 200 microseconds
> > Reliability is 255/255
> > Load is 1/255
> > Minimum MTU is 1500
> > Hop count is 1
> > External data:
> > Originating router is 150.1.5.5
> > AS number of route is 0
> > External protocol is RIP, external metric is 7
> > Administrator tag is 0 (0x00000000)
> > * 174.1.145.1 (Serial0/0/0), from 174.1.145.1, Send flag is 0x0
> > Composite metric is (2684416/2172416), Route is External*
> > Vector metric:
> > Minimum bandwidth is 1544 Kbit
> > Total delay is 40100 microseconds
> > Reliability is 255/255
> > Load is 1/255
> > Minimum MTU is 1500
> > Hop count is 2
> > External data:
> > Originating router is 150.1.5.5
> > AS number of route is 0
> > External protocol is RIP, external metric is 7
> > Administrator tag is 0 (0x00000000)
> >
> > Herbert.
> >
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