From: Omkar Tambalkar (omkar.groupstudy@gmail.com)
Date: Mon Nov 03 2008 - 03:00:37 ARST
Is this still an issue?
Have you tried ip ospf mtu-ignore on the switch/router interfaces that are
forming the adjacency?
- Omkar
On Sun, Nov 2, 2008 at 5:30 PM, Piotr <usaccie@gmail.com> wrote:
> I removed routing and checked my trunks. Everything looks ok.
>
> On sw1 f0/5 I added 183.1.105.55/24 and I could ping that from R5.
>
> I ran out of rack time......
>
> Thanks everyone.
>
>
>
>
>
>
> On Sun, Nov 2, 2008 at 7:47 PM, Hobbs <deadheadblues@gmail.com> wrote:
>
> > As a side note you should have verified that R5 and SW4 could ping each
> > other before moving on to routing. I learn the hard way too :)
> >
> >
> > On Sun, Nov 2, 2008 at 5:45 PM, Hobbs <deadheadblues@gmail.com> wrote:
> >
> >> Are you sure that SW4 f0/18 is connected to SW1 f0/15...?There seems to
> be
> >> another switch involved because SW1 is trunking on f0/15....show cdp
> >> neighbor, something funny's going on
> >>
> >>
> >> On Sun, Nov 2, 2008 at 5:33 PM, Piotr <usaccie@gmail.com> wrote:
> >>
> >>> SW4 > R5 - layer 2 path
> >>> sw4 f0/15 > sw1 f0/21 > r5 f0/0
> >>>
> >>>
> >>>
> >>>
> >>> On Sun, Nov 2, 2008 at 7:20 PM, Hobbs <deadheadblues@gmail.com> wrote:
> >>>
> >>>> Let's focus on the basics.
> >>>>
> >>>> You said "From R5 I can not ping 183.1.105.10."
> >>>>
> >>>> SW1 as far as I can tell is not routing between SW4 and R5 so we do
> not
> >>>> care about its routing table or whether it can ping any address. Sw4
> and R5
> >>>> should have a layer 2 path somewhere. What is that path?
> >>>>
> >>>> Solve this issue first.
> >>>>
> >>>>
> >>>> On Sun, Nov 2, 2008 at 5:14 PM, Piotr <usaccie@gmail.com> wrote:
> >>>>
> >>>>> RSRack1SW1(config)#do sho int trunk
> >>>>>
> >>>>> Port Mode Encapsulation Status Native vlan
> >>>>> Fa0/13 on 802.1q trunking 46
> >>>>> Fa0/15 on 802.1q trunking 46
> >>>>> Fa0/21 on 802.1q trunking 1
> >>>>>
> >>>>> Port Vlans allowed on trunk
> >>>>> Fa0/13 1-4094
> >>>>> Fa0/15 1-4094
> >>>>> Fa0/21 1-4094
> >>>>>
> >>>>> Port Vlans allowed and active in management domain
> >>>>> Fa0/13 1,6,28,33,45-46,102,105,107
> >>>>> Fa0/15 1,6,28,33,45-46,102,105,107
> >>>>> Fa0/21 1,6,28,33,45-46,102,105,107
> >>>>>
> >>>>> Port Vlans in spanning tree forwarding state and not pruned
> >>>>> Fa0/13 1,6,28,33,45-46,102,105,107
> >>>>> Fa0/15 1,6,28,33,45-46,102,105,107
> >>>>> Fa0/21 1,6,28,33,45-46,102,105,107
> >>>>> RSRack1SW1(config)#
> >>>>>
> >>>>>
> >>>>>
> >>>>> RSRack1SW4(config-if)#do sho int trunk
> >>>>>
> >>>>> Port Mode Encapsulation Status Native vlan
> >>>>> Fa0/15 on 802.1q trunking 1
> >>>>> Fa0/19 on 802.1q trunking 46
> >>>>> Fa0/20 on 802.1q trunking 46
> >>>>>
> >>>>> Port Vlans allowed on trunk
> >>>>> Fa0/15 1-4094
> >>>>> Fa0/19 1-4094
> >>>>> Fa0/20 1-4094
> >>>>>
> >>>>> Port Vlans allowed and active in management domain
> >>>>> Fa0/15 1,6,28,33,45-46,102,105,107
> >>>>> Fa0/19 1,6,28,33,45-46,102,105,107
> >>>>> Fa0/20 1,6,28,33,45-46,102,105,107
> >>>>>
> >>>>> Port Vlans in spanning tree forwarding state and not pruned
> >>>>> Fa0/15 1,6,28,33,45-46,102,105,107
> >>>>> Fa0/19 1,6,28,33,45-46,102,105,107
> >>>>> Fa0/20 1,6,28,33,45-46,102,105,107
> >>>>> RSRack1SW4(config-if)#do sho cdp nei
> >>>>> Capability Codes: R - Router, T - Trans Bridge, B - Source Route
> Bridge
> >>>>> S - Switch, H - Host, I - IGMP, r - Repeater, P -
> >>>>> Phone
> >>>>>
> >>>>> Device ID Local Intrfce Holdtme Capability
> >>>>> Platform Port ID
> >>>>> RSRack1SW3 Fas 0/20 132 S I
> >>>>> WS-C3550-2Fas 0/20
> >>>>> RSRack1SW3 Fas 0/19 132 S I
> >>>>> WS-C3550-2Fas 0/19
> >>>>> RSRack1SW3 Fas 0/21 132 S I
> >>>>> WS-C3550-2Fas 0/21
> >>>>> RSRack1SW2 Fas 0/18 157 R S I
> >>>>> WS-C3560-2Fas 0/21
> >>>>> RSRack1SW1 Fas 0/15 158 R S I
> >>>>> WS-C3560-2Fas 0/21
> >>>>> RSRack1R4 Fas 0/4 165 R S I
> >>>>> 2811 Fas 0/1
> >>>>> RSRack1R6 Fas 0/6 165 R S I
> >>>>> 2811 Fas 0/1
> >>>>>
> >>>>>
> >>>>> RSRack1SW1(config)#do ping 183.1.105.10
> >>>>>
> >>>>> Type escape sequence to abort.
> >>>>> Sending 5, 100-byte ICMP Echos to 183.1.105.10, timeout is 2
> seconds:
> >>>>> !!!!!
> >>>>> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
> >>>>> RSRack1SW1(config)#do ping 183.1.105.5
> >>>>>
> >>>>> Type escape sequence to abort.
> >>>>> Sending 5, 100-byte ICMP Echos to 183.1.105.5, timeout is 2 seconds:
> >>>>> .....
> >>>>> Success rate is 0 percent (0/5)
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> On Sun, Nov 2, 2008 at 7:09 PM, Piotr <usaccie@gmail.com> wrote:
> >>>>>
> >>>>>> R5 F0/0 has a physical connection to sw f0/5
> >>>>>>
> >>>>>> RSRack1R5(config-if)#do sri f0/0
> >>>>>> Building configuration...
> >>>>>>
> >>>>>> Current configuration : 95 bytes
> >>>>>> !
> >>>>>> interface FastEthernet0/0
> >>>>>> ip address 183.1.105.5 255.255.255.0
> >>>>>> duplex full
> >>>>>> speed 100
> >>>>>> end
> >>>>>>
> >>>>>>
> >>>>>> RSRack1SW1(config)#do sri f0/5
> >>>>>> Building configuration...
> >>>>>>
> >>>>>> Current configuration : 109 bytes
> >>>>>> !
> >>>>>> interface FastEthernet0/5
> >>>>>> switchport access vlan 105
> >>>>>> switchport mode access
> >>>>>> speed 100
> >>>>>> duplex full
> >>>>>> end
> >>>>>>
> >>>>>> On the topology map R5 F0/0 connects to sw4 f0/18
> >>>>>>
> >>>>>> SRack1SW4(config-router)# do sri f0/18
> >>>>>> Building configuration...
> >>>>>>
> >>>>>> Current configuration : 88 bytes
> >>>>>> !
> >>>>>> interface FastEthernet0/18
> >>>>>> no switchport
> >>>>>> ip address 183.1.105.10 255.255.255.0
> >>>>>> end
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> On Sun, Nov 2, 2008 at 7:06 PM, Piotr <usaccie@gmail.com> wrote:
> >>>>>>
> >>>>>>> RSRack1SW1(config-if)#do sho ip route 183.1.105.5
> >>>>>>> Routing entry for 183.1.105.0/24
> >>>>>>> Known via "eigrp 100", distance 90, metric 30720, type internal
> >>>>>>> Redistributing via eigrp 100
> >>>>>>> Last update from 183.1.107.10 on FastEthernet0/14, 00:20:27 ago
> >>>>>>> Routing Descriptor Blocks:
> >>>>>>> * 183.1.107.10, from 183.1.107.10, 00:20:27 ago, via
> >>>>>>> FastEthernet0/14
> >>>>>>> Route metric is 30720, traffic share count is 1
> >>>>>>> Total delay is 200 microseconds, minimum bandwidth is 100000
> >>>>>>> Kbit
> >>>>>>> Reliability 255/255, minimum MTU 1500 bytes
> >>>>>>> Loading 1/255, Hops 1
> >>>>>>>
> >>>>>>> RSRack1SW1(config-if)#do sho ip route 183.1.105.10
> >>>>>>> Routing entry for 183.1.105.0/24
> >>>>>>> Known via "eigrp 100", distance 90, metric 30720, type internal
> >>>>>>> Redistributing via eigrp 100
> >>>>>>> Last update from 183.1.107.10 on FastEthernet0/14, 00:20:31 ago
> >>>>>>> Routing Descriptor Blocks:
> >>>>>>> * 183.1.107.10, from 183.1.107.10, 00:20:31 ago, via
> >>>>>>> FastEthernet0/14
> >>>>>>> Route metric is 30720, traffic share count is 1
> >>>>>>> Total delay is 200 microseconds, minimum bandwidth is 100000
> >>>>>>> Kbit
> >>>>>>> Reliability 255/255, minimum MTU 1500 bytes
> >>>>>>> Loading 1/255, Hops 1
> >>>>>>>
> >>>>>>>
> >>>>>>> On Sun, Nov 2, 2008 at 6:56 PM, Narbik Kocharians <
> narbikk@gmail.com
> >>>>>>> > wrote:
> >>>>>>>
> >>>>>>>> Can you show us the configuration of the interfaces.
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> On Sun, Nov 2, 2008 at 3:44 PM, Hobbs <deadheadblues@gmail.com
> >wrote:
> >>>>>>>>
> >>>>>>>>> What is the mask of each interface?
> >>>>>>>>>
> >>>>>>>>> On Sun, Nov 2, 2008 at 4:43 PM, Hobbs <deadheadblues@gmail.com>
> >>>>>>>>> wrote:
> >>>>>>>>>
> >>>>>>>>> > 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
> >>>>>>>>> >> >>
> >>>>>>>>> >> >>
> >>>>>>>>> >> >> Blogs and organic groups at http://www.ccie.net
> >>>>>>>>> >> >>
> >>>>>>>>> >> >>
> >>>>>>>>>
> _______________________________________________________________________
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> >>>>>>>>> >>
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> >>>>>>>>> >>
> >>>>>>>>> >>
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> _______________________________________________________________________
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> >>>>>>>>>
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> >>>>>>>>>
> _______________________________________________________________________
> >>>>>>>>> Subscription information may be found at:
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> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> --
> >>>>>>>> Narbik Kocharians
> >>>>>>>> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
> >>>>>>>> www.MicronicsTraining
> >>>>>>>> www.Net-Workbooks.com
> >>>>>>>> Sr. Technical Instructor
>
>
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>
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