Configs and Sh Neighbors below, spanning tree issue persists when native
vlans are same...tell dragon that he can't eat me until I figure this out.
Thanks
--------------------R1----------------------------
Rack1SW1(config-if-range)#do sh cdp ne
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay
Device ID Local Intrfce Holdtme Capability Platform Port ID
Rack1SW2 Fas 0/14 178 S I WS-C3550- Fas 0/14
Rack1SW2 Fas 0/13 152 S I WS-C3550- Fas 0/13
Rack1SW2 Fas 0/15 152 S I WS-C3550- Fas 0/15
Rack1SW1(config-if-range)#do sh span vlan 1
13:50:01: %SW_MATM-4-MACFLAP_NOTIF: Host 0005.3246.d0c0 in vlan 1 is
flapping between port Fa0/15 and port Fa0/13
Rack1SW1(config-if-range)#do sh span vlan 1 det
VLAN0001 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, sysid 1, address 0014.f20d.7780
Configured hello time 2, max age 20, forward delay 15
We are the root of the spanning tree
Topology change flag not set, detected flag not set
Number of topology changes 33 last change occurred 00:05:23 ago
from FastEthernet0/19
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 1, topology change 0, notification 0, aging 300
Port 13 (FastEthernet0/13) of VLAN0001 is designated forwarding
Port path cost 19, Port priority 128, Port Identifier 128.13.
Designated root has priority 32769, address 0014.f20d.7780
Designated bridge has priority 32769, address 0014.f20d.7780
Designated port id is 128.13, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 10731, received 1697
Port 15 (FastEthernet0/15) of VLAN0001 is designated forwarding
Port path cost 19, Port priority 128, Port Identifier 128.15.
Designated root has priority 32769, address 0014.f20d.7780
Designated bridge has priority 32769, address 0014.f20d.7780
Designated port id is 128.15, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 3
Link type is point-to-point by default
BPDU: sent 10721, received 1695
Rack1SW1(config-if-range)#
Rack1SW1(config-if-range)#do sh run
Building configuration...
Current configuration : 5942 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Rack1SW1
!
logging buffered 20000
enable password cisco
!
no aaa new-model
ip subnet-zero
no ip domain-lookup
!
!
!
!
crypto pki trustpoint TP-self-signed-4060968832
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-4060968832
revocation-check none
rsakeypair TP-self-signed-4060968832
!
!
crypto pki certificate chain TP-self-signed-4060968832
certificate self-signed 01
30820241 308201AA A0030201 02020101 300D0609 2A864886 F70D0101 04050030
31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 34303630 39363838 3332301E 170D3933 30333031 30303031
31355A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649
4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D34 30363039
36383833 3230819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281
8100E202 22A0640A 27201D56 59B87B7E 02342407 E8A92C54 F6BA3A75 80E8280F
E8ECA366 F91C6544 820E8883 580757FB EB0C2315 88269466 3AD166AB 67F681C8
E41207FB 6E119051 4014AE3B 8B12AB84 E977A274 D78350E9 BC9CF6B8 4F55EC41
40D18604 13325AB4 6EC23EA7 B36BA010 0B4C8356 586B1B87 616D37D3 5C839F52
0D770203 010001A3 69306730 0F060355 1D130101 FF040530 030101FF 30140603
551D1104 0D300B82 09526163 6B315357 312E301F 0603551D 23041830 168014D0
FE68A144 88C50209 83D81199 324C3BCC 1D0A4330 1D060355 1D0E0416 0414D0FE
68A14488 C5020983 D8119932 4C3BCC1D 0A43300D 06092A86 4886F70D 01010405
00038181 004F1BD2 FBE88389 B9BD1891 CBBD2EC2 59F8ABE2 652DA6A6 A2EBEEC5
1E0F1707 4F522EE9 3107AEB6 95081174 F2E24660 6CE70777 51C67962 E8F0683B
A258A416 8C8E00A7 995ED2FC 31612C1A DC3A16FF 51083560 8FCA9ECE F18B2911
D8A396FE 41005DB3 6EAA1BF3 EF991456 9591A85B F7C4FEF2 FF4DC0E0 E80EFED1
598C42E0 A8
quit
!
!
spanning-tree mode pvst
spanning-tree etherchannel guard misconfig
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
!
!
interface Loopback0
ip address 150.1.7.7 255.255.255.0
!
interface FastEthernet0/1
no switchport
ip address 183.1.17.7 255.255.255.0
shutdown
!
interface FastEthernet0/2
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/3
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/4
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/5
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/6
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/7
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/8
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/9
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/10
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/11
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/12
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/13
switchport trunk encapsulation dot1q
switchport trunk native vlan 46
switchport mode trunk
!
interface FastEthernet0/14
no switchport
ip address 183.1.107.7 255.255.255.0
!
interface FastEthernet0/15
switchport trunk encapsulation dot1q
switchport trunk native vlan 46
switchport mode trunk
!
interface FastEthernet0/16
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/17
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/18
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/19
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/20
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/21
switchport trunk encapsulation dot1q
switchport mode trunk
shutdown
!
interface FastEthernet0/22
switchport mode dynamic desirable
!
interface FastEthernet0/23
switchport mode dynamic desirable
!
interface FastEthernet0/24
switchport mode dynamic desirable
!
interface FastEthernet0/25
switchport mode dynamic desirable
!
interface FastEthernet0/26
switchport mode dynamic desirable
!
interface FastEthernet0/27
switchport mode dynamic desirable
!
interface FastEthernet0/28
switchport mode dynamic desirable
!
interface FastEthernet0/29
switchport mode dynamic desirable
!
interface FastEthernet0/30
switchport mode dynamic desirable
!
interface FastEthernet0/31
switchport mode dynamic desirable
!
interface FastEthernet0/32
switchport mode dynamic desirable
!
interface FastEthernet0/33
switchport mode dynamic desirable
!
interface FastEthernet0/34
switchport mode dynamic desirable
!
interface FastEthernet0/35
switchport mode dynamic desirable
!
interface FastEthernet0/36
switchport mode dynamic desirable
!
interface FastEthernet0/37
switchport mode dynamic desirable
!
interface FastEthernet0/38
switchport mode dynamic desirable
!
interface FastEthernet0/39
switchport mode dynamic desirable
!
interface FastEthernet0/40
switchport mode dynamic desirable
!
interface FastEthernet0/41
switchport mode dynamic desirable
!
interface FastEthernet0/42
switchport mode dynamic desirable
!
interface FastEthernet0/43
switchport mode dynamic desirable
!
interface FastEthernet0/44
switchport mode dynamic desirable
!
interface FastEthernet0/45
switchport mode dynamic desirable
!
interface FastEthernet0/46
switchport mode dynamic desirable
!
interface FastEthernet0/47
switchport mode dynamic desirable
!
interface FastEthernet0/48
switchport mode dynamic desirable
!
interface GigabitEthernet0/1
switchport mode dynamic desirable
!
interface GigabitEthernet0/2
switchport mode dynamic desirable
!
interface Vlan1
no ip address
!
ip classless
ip http server
ip http secure-server
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
password cisco
logging synchronous
line vty 0 4
password cisco
login
line vty 5 15
password cisco
login
!
end
-----------------------R2--------------------------------
Rack1SW2(config-if-range)#do sh cdp ne
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,
D - Remote, C - CVTA, M - Two-port Mac Relay
Device ID Local Intrfce Holdtme Capability Platform Port ID
Rack1SW1 Fas 0/14 144 S I WS-C3550- Fas 0/14
Rack1SW1 Fas 0/15 170 S I WS-C3550- Fas 0/15
Rack1SW1 Fas 0/13 170 S I WS-C3550- Fas 0/13
Rack1SW2(config-if-range)#do sh span vlan 1 det
VLAN0001 is executing the ieee compatible Spanning Tree protocol
Bridge Identifier has priority 32768, sysid 1, address 0014.6aa3.f880
Configured hello time 2, max age 20, forward delay 15
We are the root of the spanning tree
Topology change flag not set, detected flag not set
Number of topology changes 21 last change occurred 00:08:54 ago
from FastEthernet0/19
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 1, topology change 0, notification 0, aging 300
Port 13 (FastEthernet0/13) of VLAN0001 is designated forwarding
Port path cost 19, Port priority 128, Port Identifier 128.13.
Designated root has priority 32769, address 0014.6aa3.f880
Designated bridge has priority 32769, address 0014.6aa3.f880
Designated port id is 128.13, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 14381, received 72
Port 14 (FastEthernet0/14) of VLAN0001 is designated forwarding
Port path cost 19, Port priority 128, Port Identifier 128.14.
Designated root has priority 32769, address 0014.6aa3.f880
Designated bridge has priority 32769, address 0014.6aa3.f880
Designated port id is 128.14, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 381, received 0
Port 15 (FastEthernet0/15) of VLAN0001 is designated forwarding
Port path cost 19, Port priority 128, Port Identifier 128.15.
Designated root has priority 32769, address 0014.6aa3.f880
Designated bridge has priority 32769, address 0014.6aa3.f880
Designated port id is 128.15, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is point-to-point by default
BPDU: sent 14384, received 69
Port 24 (FastEthernet0/24) of VLAN0001 is designated forwarding
Port path cost 100, Port priority 128, Port Identifier 128.24.
Designated root has priority 32769, address 0014.6aa3.f880
Designated bridge has priority 32769, address 0014.6aa3.f880
Designated port id is 128.24, designated path cost 0
Timers: message age 0, forward delay 0, hold 0
Number of transitions to forwarding state: 1
Link type is shared by default
BPDU: sent 24970, received 0
Rack1SW2(config-if-range)#do sh run
Building configuration...
Current configuration : 6114 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Rack1SW2
!
logging buffered 20000
enable password cisco
!
no aaa new-model
ip subnet-zero
no ip domain-lookup
!
!
!
!
crypto pki trustpoint TP-self-signed-1789130880
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1789130880
revocation-check none
rsakeypair TP-self-signed-1789130880
!
!
crypto pki certificate chain TP-self-signed-1789130880
certificate self-signed 01
30820241 308201AA A0030201 02020101 300D0609 2A864886 F70D0101 04050030
31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274
69666963 6174652D 31373839 31333038 3830301E 170D3933 30333031 30303031
31355A17 0D323030 31303130 30303030 305A3031 312F302D 06035504 03132649
4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D31 37383931
33303838 3030819F 300D0609 2A864886 F70D0101 01050003 818D0030 81890281
8100C2F8 F1679ED5 FCED3067 F70857D6 15B15401 E3535AAB 9112327F 9FECCE05
53025943 57BCEE4C 4A30F602 49AC6420 2BD8EAA1 4A9756DE C0052EA6 23378A90
3B49C05A 1A5D7C1B C933E082 2FE9A7DD 51241AA6 B956D6F1 623195DE 87E10CCE
BACD340D 3F9EBA67 FEC796F7 0D9D616E 3D4BA392 3335BE0F BD26EF51 23D9D60D
49270203 010001A3 69306730 0F060355 1D130101 FF040530 030101FF 30140603
551D1104 0D300B82 09526163 6B315357 322E301F 0603551D 23041830 168014C9
80FFD5A7 E39C9243 E3D26F01 FB04AE6B 37372C30 1D060355 1D0E0416 0414C980
FFD5A7E3 9C9243E3 D26F01FB 04AE6B37 372C300D 06092A86 4886F70D 01010405
00038181 0054B49D 726B3082 68982B44 167C43C1 5A46CA49 BEBFEAB9 2339A3E5
50A004AE 6D0055CB 62B23088 398FF595 3EED7CDB 3C5403CA 0EC72CA1 47FB432E
94024784 28B13285 B961F4B4 EA7EB846 52F6C1FF 52908088 9DF3FF40 CCD818CE
8D78CD5E 0C3C07EB AC4A5771 D558BE94 67B54629 C5F78ACE 373AE81D 11A458E4
B49DDA10 B5
quit
!
!
spanning-tree mode pvst
spanning-tree etherchannel guard misconfig
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
!
!
!
interface Loopback0
ip address 150.1.8.8 255.255.255.0
!
interface FastEthernet0/1
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/2
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/3
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/4
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/5
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/6
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/7
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/8
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/9
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/10
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/11
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/12
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/13
switchport trunk encapsulation dot1q
switchport trunk native vlan 46
switchport mode trunk
!
interface FastEthernet0/14
switchport mode dynamic desirable
!
interface FastEthernet0/15
switchport trunk encapsulation dot1q
switchport trunk native vlan 46
switchport mode trunk
!
interface FastEthernet0/16
switchport trunk encapsulation dot1q
switchport trunk native vlan 46
switchport mode trunk
shutdown
!
interface FastEthernet0/17
switchport trunk encapsulation dot1q
switchport trunk native vlan 46
switchport mode trunk
shutdown
!
interface FastEthernet0/18
switchport trunk encapsulation dot1q
switchport trunk native vlan 46
switchport mode trunk
shutdown
!
interface FastEthernet0/19
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/20
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/21
switchport mode dynamic desirable
shutdown
!
interface FastEthernet0/22
switchport mode dynamic desirable
!
interface FastEthernet0/23
switchport mode dynamic desirable
!
interface FastEthernet0/24
switchport mode dynamic desirable
!
interface FastEthernet0/25
switchport mode dynamic desirable
!
interface FastEthernet0/26
switchport mode dynamic desirable
!
interface FastEthernet0/27
switchport mode dynamic desirable
!
interface FastEthernet0/28
switchport mode dynamic desirable
!
interface FastEthernet0/29
switchport mode dynamic desirable
!
interface FastEthernet0/30
switchport mode dynamic desirable
!
interface FastEthernet0/31
switchport mode dynamic desirable
!
interface FastEthernet0/32
switchport mode dynamic desirable
!
interface FastEthernet0/33
switchport mode dynamic desirable
!
interface FastEthernet0/34
switchport mode dynamic desirable
!
interface FastEthernet0/35
switchport mode dynamic desirable
!
interface FastEthernet0/36
switchport mode dynamic desirable
!
interface FastEthernet0/37
switchport mode dynamic desirable
!
interface FastEthernet0/38
switchport mode dynamic desirable
!
interface FastEthernet0/39
switchport mode dynamic desirable
!
interface FastEthernet0/40
switchport mode dynamic desirable
!
interface FastEthernet0/41
switchport mode dynamic desirable
!
interface FastEthernet0/42
switchport mode dynamic desirable
!
interface FastEthernet0/43
switchport mode dynamic desirable
!
interface FastEthernet0/44
switchport mode dynamic desirable
!
interface FastEthernet0/45
switchport mode dynamic desirable
!
interface FastEthernet0/46
switchport mode dynamic desirable
!
interface FastEthernet0/47
switchport mode dynamic desirable
!
interface FastEthernet0/48
switchport mode dynamic desirable
!
interface GigabitEthernet0/1
switchport mode dynamic desirable
!
interface GigabitEthernet0/2
switchport mode dynamic desirable
!
interface Vlan1
no ip address
!
interface Vlan28
ip address 183.1.28.8 255.255.255.0
!
ip classless
ip http server
ip http secure-server
!
!
!
control-plane
!
!
line con 0
exec-timeout 0 0
privilege level 15
password cisco
logging synchronous
line vty 0 4
password cisco
login
line vty 5 15
password cisco
login
!
end
On Mon, Apr 27, 2009 at 11:50 PM, Dale Shaw <dale.shaw_at_gmail.com> wrote:
> Hi Kevin,
>
> On Tue, Apr 28, 2009 at 3:28 PM, kevin dalby <ccieconsult_at_gmail.com>
> wrote:
> > configs are off of internetworkexpert vol 2 (below)
>
> Does this condition -- where SW1 and SW2 both think they're the root
> bridge for VLAN1 -- persist once both sides have matching native
> VLANs? Or is it only a transient thing while you're in the process of
> changing from native VLAN 1 to native VLAN 46?
>
> If that condition persists, something else is going on. Post complete
> configs from both sides, as well as 'sh cdp ne' output to confirm that
> those switches are indeed connected to each other via those
> interfaces.
>
> The native VLAN should match on each side of the trunk, obviously. If
> they don't match, a giant fire-breathing dragon swoops down from above
> and pokes you in the eye with a stick.
>
> cheers,
> Dale
Blogs and organic groups at http://www.ccie.net
Received on Tue Apr 28 2009 - 00:11:22 ART
This archive was generated by hypermail 2.2.0 : Mon May 04 2009 - 07:39:13 ART