From: Hobbs (deadheadblues@gmail.com)
Date: Sun Nov 02 2008 - 21:43:08 ARST
When does it happen? After you change a parameter? I think I have seen the
issue that Bob talked about with the goodbye message causing a K-value
mismatch....It looks like you are getting the K-value mismatch, then your
adjacency is forming. This means your adjacency was brought down for some
reason - maybe you configured a summary or secondary address...
Example: I had an initial config with a mistake (on purpose). One router on
a LAN with /24 and the other with /20 mask. After I configured the /20 for a
/24, EIGRP sent a goodbye and the other router complained about a K-value
mismatch. The adjacency then came up fine.
I wonder if its a code issue...I am always running 12.4...
On Sun, Nov 2, 2008 at 4:22 PM, Piotr <usaccie@gmail.com> wrote:
> On the routers I left the MTU at default,m 1500. On the switches
> (3550/3560)
> I set the system MTU to 1500 (system MTU 1500 or system MTU routing 1500.
> Where allowed on the interface I set ip mtu 1500).
>
> Debugs don't show me anything. I was looking to shut the messages off with
> a
> command similar to ip ospf mtu-ignore but I don't see one under the
> interface.
>
> I can try and set the metric for all devices in the AS and see what
> happens.
>
>
> On Sun, Nov 2, 2008 at 3:02 PM, Bob Sinclair <bob@bobsinclair.net> wrote:
>
> > Piotr,
> >
> > Check that the MTUs match on both devices. I notice one is a switch.
> > Though the specs do not require equal MTU (like OSPF does) Cisco
> routers
> > have been known to drop EIGRP packets over MTU mismatch issues.
> > The K-value mismatch error can be caused when the near side router does
> not
> > support the "goodbye" message, added around 12.2(3), but the far side
> does.
> >
> > HTH,
> >
> > Bob Sinclair CCIE 10427 CCSI 30427
> > www.netmasterclass.net
> >
> > Piotr wrote:
> >
> >> Switch:
> >>
> >> 05:04:04: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
> >> 183.1.105.5(FastEthernet0/18) is up: new adjacency
> >> --More--
> >> 05:05:23: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
> >> 183.1.105.5(FastEthernet0/18) is down: K-value mismatch
> >> --More--
> >> 05:05:26: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
> >> 183.1.105.5(FastEthernet0/18) is up: new adjacency
> >>
> >> router eigrp 100
> >> network 183.1.105.10 0.0.0.0
> >> network 183.1.107.10 0.0.0.0
> >> no auto-summary
> >> eigrp router-id 150.1.10.10
> >>
> >> interface FastEthernet0/18
> >> no switchport
> >> ip address 183.1.105.10 255.255.255.0
> >>
> >>
> >> Routing Protocol is "eigrp 100"
> >> 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 1
> >> Redistributing: eigrp 100
> >> EIGRP NSF-aware route hold timer is 240s
> >> Automatic network summarization is not in effect
> >> Maximum path: 4
> >> Routing for Networks:
> >> 183.1.105.10/32
> >> 183.1.107.10/32
> >> Routing Information Sources:
> >> Gateway Distance Last Update
> >> 183.1.107.7 90 00:07:43
> >> Distance: internal 90 external 170
> >>
> >>
> >>
> >>
> >> router:
> >> *Nov 2 13:55:54.926: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
> >> 183.1.105.10 (FastEthernet0/0) is down: retry limit exceeded
> >> RSRack1R5(config-router)#
> >> *Nov 2 13:55:57.322: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
> >> 183.1.105.10 (FastEthernet0/0) is up: new adjacency
> >> RSRack1R5(config-router)#
> >> *Nov 2 13:57:16.834: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
> >> 183.1.105.10 (FastEthernet0/0) is down: retry limit exceeded
> >> RSRack1R5(config-router)#
> >> *Nov 2 13:57:20.290: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor
> >> 183.1.105.10 (FastEthernet0/0) is up: new adjacency
> >>
> >>
> >> router eigrp 100
> >> network 183.1.105.5 0.0.0.0
> >> no auto-summary
> >> eigrp router-id 150.1.5.5
> >>
> >>
> >> interface FastEthernet0/0
> >> ip address 183.1.105.5 255.255.255.0
> >> duplex auto
> >> speed auto
> >>
> >>
> >> Routing Protocol is "eigrp 100"
> >> 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 1
> >> Redistributing: eigrp 100
> >> EIGRP NSF-aware route hold timer is 240s
> >> Automatic network summarization is not in effect
> >> Maximum path: 4
> >> Routing for Networks:
> >> 183.1.105.5/32
> >> Routing Information Sources:
> >> Gateway Distance Last Update
> >> 183.1.105.10 90 00:09:49
> >> Distance: internal 90 external 170
> >>
> >>
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