I tried but the command doesn

samir khoury · ‎07-15-2014

Hello, I am seeing this error on our router. I read that I need to check the MTU, but it doesn't look as if that is wrong. need somebody help with this issue.

Here is some info that may help. notice the bandwidth set on one end of the connections

interface GigabitEthernet1/1
description RT-04 G1/1 to RT-3 g3/6
switchport access vlan 36
switchport mode access
logging event link-status

interface Vlan36
description GLCR04 to 3MCR01
ip address XX.XX0.202 255.255.255.248
no ip redirects
no ip unreachables
no ip proxy-arp
ip ospf authentication null
ip ospf network point-to-point

router ospf 1
router-id XX.XX0.31
log-adjacency-changes
auto-cost reference-bandwidth 10000
area 0 authentication message-digest
redistribute connected metric 100 metric-type 1 subnets route-map connected-to-ospf
redistribute static metric 100 metric-type 1 subnets route-map statics-to-ospf
network XX.XX0.31 0.0.0.0 area 0
network XX.XX0.200 0.0.0.7 area 0
network XX.XX0.216 0.0.0.7 area 0
network XX.XX1.224 0.0.0.7 area 0
network XX.XX1.232 0.0.0.7 area 0
network XX.XX2.40 0.0.0.7 area 0
!

ip route 0.0.0.0 0.0.0.0 XX.XX15.19 name Recursive_Default
ip route XX.XX2.31 255.255.255.255 XX.XX96.7
ip route XX.XX3.31 255.255.255.255 XX.XX96.7
ip route XX.XX3.64 255.255.255.248 XX.XX96.7
ip route XX.XX103.0 255.255.255.0 XX.XX99.9
ip route XX.2550.40 255.255.255.248 XX.2552.84
ip route XX.25556.0 255.255.248.0 XX.2552.84

route-map statics-to-eigrp permit 10
match ip address 10
!
route-map connected-to-ospf permit 10
match ip address 20
!
route-map statics-to-ospf permit 10
match ip address 10

RT-04#sh cdp ne g1/1
Device ID Local Intrfce Holdtme Capability Platform Port ID
-RT-3.mbusa.corpintra.net
Gig 1/1 138 R S I WS-C6509-EGig 3/6

*********************************************************************************************
RT-04

interface GigabitEthernet3/6

switchport
switchport access vlan 36
switchport mode access
!

interface Vlan36

////// bandwidth 650000 /////
ip address XX.XX0.201 255.255.255.248
no ip redirects
no ip unreachables
no ip proxy-arp
ip ospf authentication null
ip ospf network point-to-point

router ospf 1
router-id XX.XX0.1
auto-cost reference-bandwidth 100000
area 0 authentication message-digest
redistribute static
passive-interface default
no passive-interface TenGigabitEthernet1/4
no passive-interface TenGigabitEthernet1/6
no passive-interface TenGigabitEthernet2/4
no passive-interface TenGigabitEthernet2/6
no passive-interface GigabitEthernet3/11
no passive-interface Vlan15
no passive-interface Vlan16
no passive-interface Vlan21
no passive-interface Vlan30
no passive-interface Vlan31
no passive-interface Vlan32
no passive-interface Vlan35
no passive-interface Vlan36
no passive-interface Vlan39
no passive-interface Vlan138
network XX.XX0.1 0.0.0.0 area 0
network XX.XX0.32 0.0.0.7 area 0
network XX.XX0.40 0.0.0.7 area 0

Thanks

Rajeev Sharma · ‎07-15-2014

Hey,

Try configuring 'ip ospf mtu-ignore'

HTH.

Regards,

RS.

samir khoury · ‎07-15-2014

I tried but the command doesn't exist.

does the bandwitch cause that issue.

thanks

Rajeev Sharma · ‎07-15-2014

I don't believe that bandwidth command would do this, did you check the L2 path for any drops or inconsistencies.

HTH.

Regards,

RS.

samir khoury · ‎08-06-2014

please see my reply above.

thanks

Rajeev Sharma · ‎08-07-2014

Hey,

Well i only see few input errors on interface g3/6:

RT-R01#sh int g3/6
GigabitEthernet3/6 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 001e.4a3e.3055 (bia 001e.4a3e.3055)
17 input errors, 4 CRC, 4 frame, 0 overrun, 0 ignored

Other than that it looks clean, moreover i believe we don't know when these error occurred.

Clear the counters and see if it increments again, then we may say that we have located the issue.

HTH.

Regards,

RS.

samir khoury · ‎08-20-2014

thanks you guys for your help, I was able to fix the issue, we replace the fiber and that corrected it. I had the cable tech check the cable and replace it.

samir khoury · ‎08-06-2014

Sorry for taking too long to response, but I did some searching and pasted what I think is the issue. it maybe the RT04 (distribution router) and RT01 ( core Router) is having issues. please take a look and let me know what you think or suggest to help fix it.

thanks

RT-04

Aug 3 06:33:30: %OSPF-5-ADJCHG: Process 1, Nbr x.x.0.1 on Vlan36 from DOWN to DOWN, Neighbor Down: Ignore timer expired
Aug 3 06:35:42: %OSPF-5-ADJCHG: Process 1, Nbr x.x.0.1 on Vlan36 from EXCHANGE to DOWN, Neighbor Down: Too many retransmissions
Aug 3 06:36:42: %OSPF-5-ADJCHG: Process 1, Nbr x.x.0.1 on Vlan36 from DOWN to DOWN, Neighbor Down: Ignore timer expired

interface GigabitEthernet1/1
switchport access vlan 36
switchport mode access
logging event link-status

#sh int g1/1
GigabitEthernet1/1 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet Port, address is 001b.532c.2740 (bia 001b.532c.2740)
Description: RT-04 G1/1 to RT-01 G4/4
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseLH
input flow-control is on, output flow-control is off
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:22, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 7035000 bits/sec, 2282 packets/sec
     9798340 packets input, 1946446411 bytes, 0 no buffer
     Received 9681756 broadcasts (9681741 multicast)
     0 runts, 0 giants, 0 throttles
     58188 input errors, 58188 CRC, 0 frame, 0 overrun, 0 ignored
     0 input packets with dribble condition detected
     25238596441 packets output, 8056486310288 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

RT-01. Gig 1/1 135 R S I WS-C6509-EGig 3/6

**************************************************

RT-R01#
Aug 3 06:44:20: %OSPF-5-ADJCHG: Process 1, Nbr x.x.0.31 on Vlan36 from LOADING to FULL, Loading Done
Aug 5 09:17:23: %OSPF-5-ADJCHG: Process 1, Nbr x.x.0.31 on Vlan36 from LOADING to FULL, Loading Done

interface GigabitEthernet3/6
switchport
switchport access vlan 36
switchport mode access
end

RT-R01#sh int g3/6
GigabitEthernet3/6 is up, line protocol is up (connected)
Hardware is C6k 1000Mb 802.3, address is 001e.4a3e.3055 (bia 001e.4a3e.3055)
Description:
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 1000BaseLH
input flow-control is off, output flow-control is on
Clock mode is auto
ARP type: ARPA, ARP Timeout 04:00:00
Last input never, output never, output hang never
Last clearing of "show interface" counters 49w0d
Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 7009000 bits/sec, 2205 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
     14592357827 packets input, 6303707410324 bytes, 0 no buffer
     Received 19558790 broadcasts (19558781 multicasts)
     2 runts, 0 giants, 0 throttles
     17 input errors, 4 CRC, 4 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     5044948 packets output, 1013598761 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

OSPF Neighbor Down: Too many retransmissions