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having a one-way vlan 1 stp issue....

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aaron1 at gvtc

Sep 4, 2012, 2:36 PM

Post #1 of 4 (485 views)
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having a one-way vlan 1 stp issue....

ce2 can't see ce1's stp config bpdu's.

vtp and cdp are working however.

ce2 and ce1 are connected via a mpls l2vpn (vpws)....via me3600x and asr9k.

--------------------------------------

------------------------ ce1

--------------------------------------

ce1-top-crml#sh spanning-tree roo

Root Hello Max Fwd

Vlan Root ID Cost Time Age Dly Root Port

---------------- -------------------- --------- ----- --- --- ------------

VLAN0001 8193 68bc.0c61.2f80 0 2 20 15

VLAN0010 8202 68bc.0c61.2f80 0 2 20 15

VLAN0020 8212 68bc.0c61.2f80 0 2 20 15

VLAN0021 8213 68bc.0c61.2f80 0 2 20 15

VLAN0022 8214 68bc.0c61.2f80 0 2 20 15

VLAN0023 8215 68bc.0c61.2f80 0 2 20 15

VLAN0024 8216 68bc.0c61.2f80 0 2 20 15

VLAN0025 8217 68bc.0c61.2f80 0 2 20 15

VLAN0116 8308 68bc.0c61.2f80 0 2 20 15

ce1-top-crml#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

ce2-realnoc Gig 1/0/1 134 S I WS-C3750G Gig
1/0/1

--------------------------------------

------------------------ ce2

--------------------------------------

ce2-realnoc#sh span root

Root Hello Max Fwd

Vlan Root ID Cost Time Age Dly Root Port

---------------- -------------------- --------- ----- --- --- ------------

VLAN0001 16385 68bc.0c61.3a80 0 2 20 15

VLAN0010 8202 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0020 8212 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0021 8213 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0022 8214 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0023 8215 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0024 8216 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0025 8217 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0116 8308 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

ce2-realnoc#

ce2-realnoc#

ce2-realnoc#sh spann vl 1 | in ddress

Address 68bc.0c61.3a80

Address 68bc.0c61.3a80

ce2-realnoc#

ce2-realnoc#sh spann vl 10 | in ddress

Address 68bc.0c61.2f80

Address 68bc.0c61.3a80

ce2-realnoc#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

ce1-top-crml Gig 1/0/1 168 S I WS-C3750G Gig
1/0/1

--------------------------------------

--------------- ce1 is connect to 9k

--------------------------------------

RP/0/RSP0/CPU0:sv-b-9k#sh run in g0/0/0/9.116

Tue Sep 4 16:06:37.757 CDT

interface GigabitEthernet0/0/0/9.116 l2transport

description c7 tls-test

encapsulation dot1q any

l2protocol cpsv tunnel

!

RP/0/RSP0/CPU0:sv-b-9k#

RP/0/RSP0/CPU0:sv-b-9k#sh run l2vpn xconnect gr tls-test

Tue Sep 4 16:06:51.493 CDT

l2vpn

xconnect group tls-test

p2p tls-test

interface GigabitEthernet0/0/0/9.116

neighbor 10.101.12.253 pw-id 20000

!

!

!

!

--------------------------------------

------------ ce2 is connect to me3600

--------------------------------------

noc-3600#sh run in g0/23

Building configuration...

Current configuration : 267 bytes

!

interface GigabitEthernet0/23

description c7 tls-test

switchport trunk allowed vlan none

switchport mode trunk

load-interval 30

service instance 1 ethernet

encapsulation dot1q 1-4094

l2protocol tunnel

xconnect 10.101.0.3 20000 encapsulation mpls

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aaron1 at gvtc

Sep 4, 2012, 2:51 PM

Post #2 of 4 (470 views)
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Re: having a one-way vlan 1 stp issue.... [In reply to]

I *can* ping and telnet from ce2 to ce1 over vlan 1...stp just not working.

Appreciate any assistance

Aaron

ce2-realnoc>sh ip int br vl 1
Interface IP-Address OK? Method Status
Protocol
Vlan1 1.1.1.2 YES manual up up
ce2-realnoc>
ce2-realnoc>1.1.1.1
Trying 1.1.1.1 ... Open

User Access Verification

Password:
ce1-top-crml>
ce1-top-crml>exit

[Connection to 1.1.1.1 closed by foreign host]
ce2-realnoc>

-----Original Message-----
From: cisco-nsp-bounces [at] puck
[mailto:cisco-nsp-bounces [at] puck] On Behalf Of Aaron
Sent: Tuesday, September 04, 2012 4:37 PM
To: cisco-nsp [at] puck
Subject: [c-nsp] having a one-way vlan 1 stp issue....

ce2 can't see ce1's stp config bpdu's.

vtp and cdp are working however.

ce2 and ce1 are connected via a mpls l2vpn (vpws)....via me3600x and asr9k.

--------------------------------------

------------------------ ce1

--------------------------------------

ce1-top-crml#sh spanning-tree roo

Root Hello Max Fwd

Vlan Root ID Cost Time Age Dly Root Port

---------------- -------------------- --------- ----- --- --- ------------

VLAN0001 8193 68bc.0c61.2f80 0 2 20 15

VLAN0010 8202 68bc.0c61.2f80 0 2 20 15

VLAN0020 8212 68bc.0c61.2f80 0 2 20 15

VLAN0021 8213 68bc.0c61.2f80 0 2 20 15

VLAN0022 8214 68bc.0c61.2f80 0 2 20 15

VLAN0023 8215 68bc.0c61.2f80 0 2 20 15

VLAN0024 8216 68bc.0c61.2f80 0 2 20 15

VLAN0025 8217 68bc.0c61.2f80 0 2 20 15

VLAN0116 8308 68bc.0c61.2f80 0 2 20 15

ce1-top-crml#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

ce2-realnoc Gig 1/0/1 134 S I WS-C3750G Gig
1/0/1

--------------------------------------

------------------------ ce2

--------------------------------------

ce2-realnoc#sh span root

Root Hello Max Fwd

Vlan Root ID Cost Time Age Dly Root Port

---------------- -------------------- --------- ----- --- --- ------------

VLAN0001 16385 68bc.0c61.3a80 0 2 20 15

VLAN0010 8202 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0020 8212 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0021 8213 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0022 8214 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0023 8215 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0024 8216 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0025 8217 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

VLAN0116 8308 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

ce2-realnoc#

ce2-realnoc#

ce2-realnoc#sh spann vl 1 | in ddress

Address 68bc.0c61.3a80

Address 68bc.0c61.3a80

ce2-realnoc#

ce2-realnoc#sh spann vl 10 | in ddress

Address 68bc.0c61.2f80

Address 68bc.0c61.3a80

ce2-realnoc#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

ce1-top-crml Gig 1/0/1 168 S I WS-C3750G Gig
1/0/1

--------------------------------------

--------------- ce1 is connect to 9k

--------------------------------------

RP/0/RSP0/CPU0:sv-b-9k#sh run in g0/0/0/9.116

Tue Sep 4 16:06:37.757 CDT

interface GigabitEthernet0/0/0/9.116 l2transport

description c7 tls-test

encapsulation dot1q any

l2protocol cpsv tunnel

!

RP/0/RSP0/CPU0:sv-b-9k#

RP/0/RSP0/CPU0:sv-b-9k#sh run l2vpn xconnect gr tls-test

Tue Sep 4 16:06:51.493 CDT

l2vpn

xconnect group tls-test

p2p tls-test

interface GigabitEthernet0/0/0/9.116

neighbor 10.101.12.253 pw-id 20000

!

!

!

!

--------------------------------------

------------ ce2 is connect to me3600

--------------------------------------

noc-3600#sh run in g0/23

Building configuration...

Current configuration : 267 bytes

!

interface GigabitEthernet0/23

description c7 tls-test

switchport trunk allowed vlan none

switchport mode trunk

load-interval 30

service instance 1 ethernet

encapsulation dot1q 1-4094

l2protocol tunnel

xconnect 10.101.0.3 20000 encapsulation mpls

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aaron1 at gvtc

Sep 6, 2012, 8:36 AM

Post #3 of 4 (447 views)
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Re: having a one-way vlan 1 stp issue.... [In reply to]

Any idea why I can only see spanning tree for vlan 1 in *one direction* ?
all other vlan's stp work fine. AND if I flip the stp priority to prefer
root bridge placement on CE2 IT WORKS! See below. (also bidirectional
flows work for vlan 1 pings, vtp and cdp) ONLY STP VLAN 1 is broke in one
direction ...that's the only problem I'm seeing.

Aaron

(topology)

CE2 (3750) g1/0/1 trunk all-----------g0/23
(me3600)---mpls-----(asr9k)g0/0/0/9/.116----- trunk all g1/0/1 (3750) CE1

(configs)

----------------------
----- CE2
----------------------

ce2-realnoc#sh run in g1/0/1

interface GigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport mode trunk
end

----------------------
---- PE (3600)
----------------------

noc-3600#sh run in g0/23

interface GigabitEthernet0/23
description c7 tls-test
switchport trunk allowed vlan none
switchport mode trunk
load-interval 30
service instance 1 ethernet
encapsulation dot1q 1-4094
l2protocol tunnel cdp stp vtp dtp pagp lldp lacp udld
xconnect 10.101.0.3 20000 encapsulation mpls

----------------------
----- PE (asr9k)
----------------------

RP/0/RSP0/CPU0:sv-b-9k#sh run l2vpn xconnect group tls-test

l2vpn
xconnect group tls-test
p2p tls-test
interface GigabitEthernet0/0/0/9.116
neighbor 10.101.12.253 pw-id 20000

----------------------
----- CE1
----------------------

ce1-top-crml#sh run in g1/0/1

interface GigabitEthernet1/0/1
switchport trunk encapsulation dot1q
switchport mode trunk
end

(what I'm seeing)

CE2 <<<----------- stp broke in this direction ONLY FOR VLAN 1 --------
CE1 (from ce1 to ce2)

Ce2 *doesn't* see vlan 1 config bpdu's carrying superior bridge prio of 8193
!!

ce2-realnoc#sh sp roo

Root Hello Max Fwd
Vlan Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
VLAN0001 32769 68bc.0c61.3a80 0 2 20 15
VLAN0010 8202 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0020 8212 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0021 8213 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0022 8214 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0023 8215 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0024 8216 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0025 8217 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0116 8308 68bc.0c61.2f80 4 2 20 15 Gi1/0/1

ce1-top-crml#sh sp roo

Root Hello Max Fwd
Vlan Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
VLAN0001 8193 68bc.0c61.2f80 0 2 20 15
VLAN0010 8202 68bc.0c61.2f80 0 2 20 15
VLAN0020 8212 68bc.0c61.2f80 0 2 20 15
VLAN0021 8213 68bc.0c61.2f80 0 2 20 15
VLAN0022 8214 68bc.0c61.2f80 0 2 20 15
VLAN0023 8215 68bc.0c61.2f80 0 2 20 15
VLAN0024 8216 68bc.0c61.2f80 0 2 20 15
VLAN0025 8217 68bc.0c61.2f80 0 2 20 15
VLAN0116 8308 68bc.0c61.2f80 0 2 20 15

----------------------------------------------------------------------------
-------------

CE2 ----------- stp works in this direction for vlan 1 -------->>> CE1
(from ce2 to ce1)

Ce1 *does* see vlan 1 config bpdu's carrying superior bridge prio of 4097

ce2-realnoc#conf t
ce2-realnoc(config)#spanning-tree vl 1 priority 4096
ce2-realnoc(config)#^Z
ce2-realnoc#sh sp roo
*Mar 2 18:58:12.604: %SYS-5-CONFIG_I: Configured from console by console

Root Hello Max Fwd
Vlan Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
VLAN0001 4097 68bc.0c61.3a80 0 2 20 15
VLAN0010 8202 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0020 8212 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0021 8213 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0022 8214 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0023 8215 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0024 8216 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0025 8217 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
VLAN0116 8308 68bc.0c61.2f80 4 2 20 15 Gi1/0/1
ce2-realnoc#

ce1-top-crml#sh sp roo

Root Hello Max Fwd
Vlan Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
VLAN0001 4097 68bc.0c61.3a80 4 2 20 15 Gi1/0/1
VLAN0010 8202 68bc.0c61.2f80 0 2 20 15
VLAN0020 8212 68bc.0c61.2f80 0 2 20 15
VLAN0021 8213 68bc.0c61.2f80 0 2 20 15
VLAN0022 8214 68bc.0c61.2f80 0 2 20 15
VLAN0023 8215 68bc.0c61.2f80 0 2 20 15
VLAN0024 8216 68bc.0c61.2f80 0 2 20 15
VLAN0025 8217 68bc.0c61.2f80 0 2 20 15
VLAN0116 8308 68bc.0c61.2f80 0 2 20 15

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cisco-nsp at ml

Sep 7, 2012, 3:15 PM

Post #4 of 4 (431 views)
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Re: having a one-way vlan 1 stp issue.... [In reply to]

* Aaron <aaron1 [at] gvtc> [2012-09-04 23:39]:
> ce2 can't see ce1's stp config bpdu's.
>
>
>
> vtp and cdp are working however.
>
>
>
> ce2 and ce1 are connected via a mpls l2vpn (vpws)....via me3600x and asr9k.

Hi,

is your native VLAN tagged on the link? You might be suffering from
CSCta17209.

Try turning it off or upgrade your 3750 to a newer IOS.

--
GPG Key: 0x93A0B9CE (F4F6 B1A3 866B 26E9 450A 9D82 58A2 D94A 93A0 B9CE)
'Are you Death?' ... IT'S THE SCYTHE, ISN'T IT? PEOPLE ALWAYS NOTICE THE SCYTHE.
-- Terry Pratchett, The Fifth Elephant
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