Diagnostics Sample Question:
Your job is to diagnose & locate the source of the problem, please post your comments below & I will follow this up with a post detailing the solution in due course.
:::
The following is the topology for BlogTown's new network that has just been installed. It is made up of three multilayer switches. The core switch 'Switch 2' provides layer three access to various services, such as the Internet & internal servers.
The two clients that connected to Switch 1 & Switch 3 are both in the same VLAN & subnet '192.168.1.0/24'
Reported issue:
The users of the clients have complained that they cannot communicate directly with one another.
Troubleshooting already completed:
Ping tests were run from both client PC's to test reachability. Following this a second ping test was run to see if either client could reach the Internet facing port Eth1/1 on Switch 2, results can be seen below in the log file 'Initial Pings".
Further Information Requested:
To help isolate the fault the following items were asked for & can be seen below:
-"show run" from all three switches
-"show vtp status" from all three switches
-"show vlan" from switches 1 & 3
-"show spanning-tree" from switch 1
-"show log" from switch 2
Initial Pings:
CLIENT1#ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 5/5/5 ms
CLIENT1#ping 192.168.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
CLIENT1#ping 192.168.255.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.255.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
CLIENT2#ping 192.168.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/5 ms
CLIENT2#ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
CLIENT2#ping 192.168.255.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.255.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
Show Command outputs
!!!!Switch 1
SW1#show run
Building configuration...
Current configuration : 1469 bytes
!
! Last configuration change at 04:01:14 CST Sat Nov 5 2016
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname SW1
!
boot-start-marker
boot-end-marker
!
!
enable password cisco
!
no aaa new-model
clock timezone CST -6 0
!
!
!
!
!
!
!
!
no ip domain-lookup
ip cef
ipv6 multicast rpf use-bgp
no ipv6 cef
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
switchport mode dynamic desirable
shutdown
!
interface Ethernet0/1
switchport mode dynamic desirable
shutdown
!
interface Ethernet0/2
switchport access vlan 1008
switchport mode access
!
interface Ethernet0/3
switchport mode dynamic desirable
shutdown
!
interface Ethernet1/0
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Ethernet1/1
switchport mode dynamic desirable
shutdown
!
interface Ethernet1/2
switchport mode dynamic desirable
shutdown
!
interface Ethernet1/3
switchport mode dynamic desirable
shutdown
!
interface Vlan1
ip address 192.168.0.1 255.255.255.0
ip ospf 1 area 0
!
interface Vlan1008
ip address 192.168.1.11 255.255.255.0
ip ospf 1 area 0
!
router ospf 1
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
line con 0
logging synchronous
line aux 0
line vty 0 4
password cisco
login
!
!
end
SW1#show vtp status
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : CISCO
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : aabb.cc00.6500
Feature VLAN:
--------------
VTP Operating Mode : Primary Server
Number of existing VLANs : 9
Number of existing extended VLANs : 1
Maximum VLANs supported locally : 4096
Configuration Revision : 4
Primary ID : aabb.cc00.6500
Primary Description : SW1
MD5 digest : 0xE5 0x6D 0x8F 0x0B 0x12 0x2E 0xF7 0xF1
0x48 0xE9 0xF6 0x57 0x27 0x93 0x1E 0xB4
Feature MST:
--------------
VTP Operating Mode : Transparent
Feature UNKNOWN:
--------------
VTP Operating Mode : Transparent
SW1#show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Et0/0, Et0/1, Et0/3, Et1/1
Et1/2, Et1/3
2 VLAN0002 active
5 VLAN0005 active
55 VLAN0055 active
66 VLAN0066 active
1002 fddi-default act/unsup
1003 trcrf-default act/unsup
1004 fddinet-default act/unsup
1005 trbrf-default act/unsup
1008 VLAN1008 active Et0/2
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
2 enet 100002 1500 - - - - - 0 0
5 enet 100005 1500 - - - - - 0 0
55 enet 100055 1500 - - - - - 0 0
66 enet 100066 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1003 trcrf 101003 4472 1005 3276 - - srb 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trbrf 101005 4472 - - 15 ibm - 0 0
1008 enet 101008 1500 - - - - - 0 0
VLAN AREHops STEHops Backup CRF
---- ------- ------- ----------
1003 7 7 off
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
SW1#show spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address aabb.cc00.6500
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address aabb.cc00.6500
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et1/0 Desg FWD 100 128.5 Shr
VLAN0002
Spanning tree enabled protocol ieee
Root ID Priority 32770
Address aabb.cc00.6500
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32770 (priority 32768 sys-id-ext 2)
Address aabb.cc00.6500
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et1/0 Desg FWD 100 128.5 Shr
VLAN0005
Spanning tree enabled protocol ieee
Root ID Priority 32773
Address aabb.cc00.6500
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32773 (priority 32768 sys-id-ext 5)
Address aabb.cc00.6500
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et1/0 Desg FWD 100 128.5 Shr
VLAN0055
Spanning tree enabled protocol ieee
Root ID Priority 32823
Address aabb.cc00.6500
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32823 (priority 32768 sys-id-ext 55)
Address aabb.cc00.6500
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et1/0 Desg FWD 100 128.5 Shr
VLAN0066
Spanning tree enabled protocol ieee
Root ID Priority 32834
Address aabb.cc00.6500
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32834 (priority 32768 sys-id-ext 66)
Address aabb.cc00.6500
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et1/0 Desg FWD 100 128.5 Shr
VLAN1008
Spanning tree enabled protocol ieee
Root ID Priority 33776
Address aabb.cc00.6500
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 33776 (priority 32768 sys-id-ext 1008)
Address aabb.cc00.6500
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Et0/2 Desg FWD 100 128.3 Shr
Et1/0 Desg FWD 100 128.5 Shr
!!!!Switch 2
SW2#show run
Building configuration...
Current configuration : 1515 bytes
!
! Last configuration change at 04:03:56 CST Sat Nov 5 2016
!
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service compress-config
!
hostname SW2
!
boot-start-marker
boot-end-marker
!
!
enable password cisco
!
no aaa new-model
clock timezone CST -6 0
!
!
!
!
!
!
!
!
no ip domain-lookup
ip cef
ipv6 multicast rpf use-bgp
no ipv6 cef
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
no switchport
ip address 192.168.23.2 255.255.255.0
duplex auto
!
interface Ethernet0/1
no switchport
ip address 192.168.24.2 255.255.255.0
duplex auto
!
interface Ethernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Ethernet0/3
shutdown
!
interface Ethernet1/0
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Ethernet1/1
no switchport
ip address 192.168.255.2 255.255.255.0
duplex auto
!
interface Ethernet1/2
no switchport
ip address 192.168.25.2 255.255.255.0
duplex auto
!
interface Ethernet1/3
no switchport
ip address 192.168.26.2 255.255.255.0
duplex auto
!
interface Vlan1
ip address 192.168.0.2 255.255.255.0
ip ospf 1 area 0
!
router ospf 1
network 0.0.0.0 255.255.255.255 area 0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
line con 0
logging synchronous
line aux 0
line vty 0 4
password cisco
login
!
!
end
SW2#show vtp status
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : CISCO
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : aabb.cc00.6600
Feature VLAN:
--------------
VTP Operating Mode : Client
Number of existing VLANs : 9
Number of existing extended VLANs : 0
Maximum VLANs supported locally : 4096
Configuration Revision : 4
Primary ID : aabb.cc00.6500
Primary Description : SW1
MD5 digest : 0xE5 0x6D 0x8F 0x0B 0x12 0x2E 0xF7 0xF1
0x48 0xE9 0xF6 0x57 0x27 0x93 0x1E 0xB4
Feature MST:
--------------
VTP Operating Mode : Transparent
Feature UNKNOWN:
--------------
VTP Operating Mode : Transparent
SW2#show log
*Nov 5 09:56:59.789: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down
*Nov 5 09:57:52.203: %LINK-3-UPDOWN: Interface Vlan1, changed state to up
*Nov 5 09:57:53.210: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
*Nov 5 09:58:14.336: ICMP: echo reply sent, src 192.168.0.2, dst 192.168.0.1, topology BASE, dscp 0 topoid 0
*Nov 5 09:58:14.336: ICMP: echo reply sent, src 192.168.0.2, dst 192.168.0.1, topology BASE, dscp 0 topoid 0
*Nov 5 09:58:14.337: ICMP: echo reply sent, src 192.168.0.2, dst 192.168.0.1, topology BASE, dscp 0 topoid 0
*Nov 5 09:58:14.337: ICMP: echo reply sent, src 192.168.0.2, dst 192.168.0.1, topology BASE, dscp 0 topoid 0
*Nov 5 09:58:14.337: ICMP: echo reply sent, src 192.168.0.2, dst 192.168.0.1, topology BASE, dscp 0 topoid 0
*Nov 5 09:58:36.026: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Vlan1 from LOADING to FULL, Loading Done
*Nov 5 09:58:39.008: %OSPF-5-ADJCHG: Process 1, Nbr 10.11.0.103 on Vlan1 from LOADING to FULL, Loading Done
*Nov 5 10:01:08.538: %LINK-5-CHANGED: Interface Loopback0, changed state to administratively down
*Nov 5 10:01:09.544: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to down
*Nov 5 10:01:25.687: %SYS-5-CONFIG_I: Configured from console by console
*Nov 5 10:02:03.321: ICMP: echo reply sent, src 192.168.23.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:02:05.321: ICMP: echo reply sent, src 192.168.23.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:03:12.127: ICMP: echo reply sent, src 192.168.23.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:03:12.128: ICMP: echo reply sent, src 192.168.23.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:03:12.128: ICMP: echo reply sent, src 192.168.23.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:03:12.128: ICMP: echo reply sent, src 192.168.23.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:03:12.128: ICMP: echo reply sent, src 192.168.23.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:03:56.453: %SYS-5-CONFIG_I: Configured from console by console
*Nov 5 10:05:37.356: ICMP: echo reply sent, src 192.168.26.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:05:39.359: ICMP: echo reply sent, src 192.168.26.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:06:03.944: ICMP: echo reply sent, src 192.168.26.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:06:05.947: ICMP: echo reply sent, src 192.168.26.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:25:34.323: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:25:34.324: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:25:34.324: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:25:34.324: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:25:34.324: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.1, topology BASE, dscp 0 topoid 0
*Nov 5 10:26:30.455: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:26:30.455: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:26:30.455: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:26:30.455: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:26:30.455: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:39:24.829: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:39:31.234: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:39:34.116: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:39:40.977: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:39:43.416: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:39:50.317: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:39:52.829: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:00.058: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:02.544: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:07.017: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:07.022: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:07.027: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:07.032: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:07.036: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:09.162: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: 192.168.0.1 address 192.168.0.1 is dead
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: 192.168.0.1 address 192.168.0.1 is dead, state DOWN
*Nov 5 10:40:11.680: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Vlan1 from FULL to DOWN, Neighbor Down: Dead timer expired
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: Neighbor change event
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: DR/BDR election
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: Elect BDR 10.11.0.103
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: Elect DR 10.11.0.103
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: DR: 10.11.0.103 (Id)
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: BDR: 10.11.0.103 (Id)
*Nov 5 10:40:11.680: OSPF-1 ADJ Vl1: Remember old DR 192.168.0.1 (id)
*Nov 5 10:40:12.126: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: Neighbor change event
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: DR/BDR election
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: Elect BDR 10.11.0.102
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: Elect DR 10.11.0.103
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: Elect BDR 10.11.0.102
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: Elect DR 10.11.0.103
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: DR: 10.11.0.103 (Id)
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: BDR: 10.11.0.102 (Id)
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: Neighbor change event
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: DR/BDR election
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: Elect BDR 10.11.0.102
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: Elect DR 10.11.0.103
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: DR: 10.11.0.103 (Id)
*Nov 5 10:40:17.911: OSPF-1 ADJ Vl1: BDR: 10.11.0.102 (Id)
*Nov 5 10:40:18.672: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:21.668: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:24.550: %PM-4-EXT_VLAN_INUSE: VLAN 1008 currently in use by Ethernet1/2
*Nov 5 10:40:24.550: %SW_VLAN-4-VLAN_CREATE_FAIL: Failed to create VLANs 1008: VLAN(s) not available in Port Manager
*Nov 5 10:40:28.125: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:31.354: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Rcv DBD from 192.168.0.1 seq 0x1FF1 opt 0x52 flag 0x7 len 32 mtu 1500 state INIT
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: 2 Way Communication to 192.168.0.1, state 2WAY
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Neighbor change event
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: DR/BDR election
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Elect BDR 10.11.0.102
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Elect DR 10.11.0.103
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: DR: 10.11.0.103 (Id)
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: BDR: 10.11.0.102 (Id)
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Nbr 192.168.0.1: Prepare dbase exchange
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Send DBD to 192.168.0.1 seq 0x334 opt 0x52 flag 0x7 len 32
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: NBR Negotiation Done. We are the SLAVE
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Nbr 192.168.0.1: Summary list built, size 5
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Send DBD to 192.168.0.1 seq 0x1FF1 opt 0x52 flag 0x2 len 132
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Rcv DBD from 192.168.0.1 seq 0x1FF2 opt 0x52 flag 0x1 len 92 mtu 1500 state EXCHANGE
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Exchange Done with 192.168.0.1
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Send LS REQ to 192.168.0.1 length 36 LSA count 1
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Send DBD to 192.168.0.1 seq 0x1FF2 opt 0x52 flag 0x0 len 32
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Rcv LS UPD from 192.168.0.1 length 76 LSA count 1
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Synchronized with 192.168.0.1, state FULL
*Nov 5 10:40:36.754: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.0.1 on Vlan1 from LOADING to FULL, Loading Done
*Nov 5 10:40:36.754: OSPF-1 ADJ Vl1: Rcv LS REQ from 192.168.0.1 length 72 LSA count 4
*Nov 5 10:40:37.243: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:37.244: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:37.244: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:37.244: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:37.244: ICMP: echo reply sent, src 192.168.255.2, dst 192.168.1.2, topology BASE, dscp 0 topoid 0
*Nov 5 10:40:37.394: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:40.621: OSPF-1 ADJ Et0/0: Rcv pkt from 192.168.24.2, area 0.0.0.0 : src not on the same network
*Nov 5 10:40:41.452: OSPF-1 ADJ Vl1: Neighbor change event
*Nov 5 10:40:41.452: OSPF-1 ADJ Vl1: DR/BDR election
*Nov 5 10:40:41.452: OSPF-1 ADJ Vl1: Elect BDR 10.11.0.102
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: Elect DR 10.11.0.103
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: DR: 10.11.0.103 (Id)
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: BDR: 10.11.0.102 (Id)
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: Neighbor change event
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: DR/BDR election
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: Elect BDR 10.11.0.102
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: Elect DR 10.11.0.103
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: DR: 10.11.0.103 (Id)
*Nov 5 10:40:41.453: OSPF-1 ADJ Vl1: BDR: 10.11.0.102 (Id)
*Nov 5 10:40:47.172: OSPF-1 ADJ Et0/1: Rcv pkt from 192.168.23.2, area 0.0.0.0 : src not on the same network
!!!!Switch 3
SW3#show run
Building configuration...
Current configuration : 1272 bytes
!
! Last configuration change at 04:29:39 CST Sat Nov 5 2016
!
version 15.2
no service timestamps debug uptime
no service timestamps log uptime
no service password-encryption
service compress-config
!
hostname SW3
!
boot-start-marker
boot-end-marker
!
!
enable password cisco
!
no aaa new-model
clock timezone CST -6 0
!
!
!
!
!
!
!
!
no ip domain-lookup
ip cef
ipv6 multicast rpf use-bgp
no ipv6 cef
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Ethernet0/0
shutdown
!
interface Ethernet0/1
shutdown
!
interface Ethernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Ethernet0/3
shutdown
!
interface Ethernet1/0
shutdown
!
interface Ethernet1/1
switchport access vlan 1008
switchport mode access
!
interface Ethernet1/2
shutdown
!
interface Ethernet1/3
shutdown
!
interface Vlan1
ip address 192.168.0.3 255.255.255.0
ip ospf 1 area 0
!
interface Vlan1008
ip address 192.168.1.33 255.255.255.0
ip ospf 1 area 0
!
router ospf 1
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
logging synchronous
line aux 0
line vty 0 4
password cisco
no login
!
!
end
SW3#show vtp status
VTP Version capable : 1 to 3
VTP version running : 3
VTP Domain Name : CISCO
VTP Pruning Mode : Disabled
VTP Traps Generation : Disabled
Device ID : aabb.cc00.6700
Feature VLAN:
--------------
VTP Operating Mode : Client
Number of existing VLANs : 9
Number of existing extended VLANs : 1
Maximum VLANs supported locally : 4096
Configuration Revision : 4
Primary ID : aabb.cc00.6500
Primary Description : SW1
MD5 digest : 0xE5 0x6D 0x8F 0x0B 0x12 0x2E 0xF7 0xF1
0x48 0xE9 0xF6 0x57 0x27 0x93 0x1E 0xB4
Feature MST:
--------------
VTP Operating Mode : Transparent
Feature UNKNOWN:
--------------
VTP Operating Mode : Transparent
SW3#show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Et0/0, Et0/1, Et0/3, Et1/0
Et1/2, Et1/3
2 VLAN0002 active
5 VLAN0005 active
55 VLAN0055 active
66 VLAN0066 active
1002 fddi-default act/unsup
1003 trcrf-default act/unsup
1004 fddinet-default act/unsup
1005 trbrf-default act/unsup
1008 VLAN1008 active Et1/1
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
2 enet 100002 1500 - - - - - 0 0
5 enet 100005 1500 - - - - - 0 0
55 enet 100055 1500 - - - - - 0 0
66 enet 100066 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1003 trcrf 101003 4472 1005 3276 - - srb 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trbrf 101005 4472 - - 15 ibm - 0 0
1008 enet 101008 1500 - - - - - 0 0
VLAN AREHops STEHops Backup CRF
---- ------- ------- ----------
1003 7 7 off
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
Again, your job is to diagnose & locate the source of the problem, please post your comments below & I will follow this up with a post detailing the solution in due course.
Thank you very much for this example. Very intriguing and interesting.
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