Solved: STP problem - Page 2

d.navetto · ‎02-21-2013

Hey guy! I need some help for my network LAN.

I have configurated some switch ( catalyst 3560 )access with the Fastethernet in access for Vlan 360. This Device is trunked with a Core ( caltalyst 6509) layer, trunked itself with another distribution layer for the server farm ( caltalyst 6513). the VLan is native on the Cat 6513 who is its root spanning tree and it is forwarded trough the entire lan to the access switch. The client gets the IP address but it can't ping its gateway and it is totally out of the network.This Vlan is a Management Vlan and also the server have the same subnet. All the servers are ok and totally reachable by any another vlans. Btw if i put a client directly both on the core or the distribution layer it works perfectly.

Any suggestion ?

d.navetto · ‎02-23-2013

thanks to all ! i noticed that the link between 6509 and 6513 Master are in that state !!

Sorry i have a question.... but if the po2 on the 6059 is Root spanning tree port for vlan 360 should be in trunk forwarding... it's correct ?

watch this

6509#sh spanning-tree vlan 360 root

Root Hello Max Fwd

Vlan Root ID Cost Time Age Dly Root Port

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

VLAN0360 8552 0024.c480.1a40 1 2 20 15 Po2

6509#sh int po2 trunk

Port Mode Encapsulation Status Native vlan

Po2 on 802.1q trunking 1

Port Vlans allowed on trunk

Po2 1-4094

Port Vlans allowed and active in management domain

Po2 1-2,8-9,11,18,22,26,30,44-45,50,90,101,200,222-223,225,227,231,234,250-263,268-270,301-352,358-360,363-364,368,371-374,389-390,468,476,492,499-500,554-559,729,900-902

Port Vlans in spanning tree forwarding state and not pruned

Po2 1-2,390

(Root For Vlan 360 )6513#sh spanning-tree vlan 360 root

Root Hello Max Fwd

Vlan Root ID Cost Time Age Dly Root Port

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

VLAN0360 8552 0024.c480.1a40 0 2 20 15

6513#sh int po2 tru

Port Mode Encapsulation Status Native vlan

Po2 on 802.1q trunking 1

Port Vlans allowed on trunk

Po2 1-4094

Port Vlans allowed and active in management domain

Po2 1-2,8,10-11,16,18,22,26,44-45,90,101,200,222-223,225,227,231,234,301-349,352-360,363-399,460-468,499,550-554,700,900-901

Port Vlans in spanning tree forwarding state and not pruned

Po2 1-2,8,10-11,16,18,22,26,44-45,90,101,200,222-223,225,227,231,234,301-349,352-360,363-389,391-399,460-468,499,550-554,700,900-901

paul driver · ‎02-24-2013

David,

this could be a possible stp issue, it my also mean we could manipulate the stp path to resolve this, Can you post the relevant output from the show commands requested above.

res

Paul

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Kind Regards
Paul

d.navetto · ‎02-25-2013

On 6509 ..

sh standby brief

P indicates configured to preempt.

|

Interface Grp Pri P State Active Standby Virtual IP

Vl9 102 100 Init unknown unknown 172.18.248.254

Vl101 100 110 P Active local 172.21.0.3 172.21.0.1

Vl200 200 110 P Active local 172.21.200.3 172.21.200.1

Vl231 1 100 P Standby 172.18.242.2 local 172.18.242.1

Vl234 234 110 P Active local 10.81.1.3 10.81.1.1

Vl250 250 110 P Active local 172.21.222.3 172.21.222.1

Vl251 251 110 P Active local 172.21.201.3 172.21.201.1

Vl252 52 100 P Standby 172.21.201.131 local 172.21.201.129

Vl253 202 100 P Standby 172.21.202.3 local 172.21.202.1

Vl254 203 110 P Active local 172.21.204.3 172.21.204.1

Vl255 204 110 P Active local 172.21.206.3 172.21.206.1

Vl256 205 110 P Active local 172.21.208.3 172.21.208.1

Vl257 206 100 P Standby 172.21.210.3 local 172.21.210.1

Vl258 207 110 P Active local 172.21.212.3 172.21.212.1

Vl259 208 110 P Active local 172.21.214.3 172.21.214.1

Vl260 209 100 P Standby 172.21.216.3 local 172.21.216.1

Vl261 210 110 P Active local 172.21.218.2 172.21.218.1

Vl262 211 100 P Standby 172.21.220.3 local 172.21.220.1

Vl263 212 110 P Active local 172.21.224.3 172.21.224.1

Vl268 217 100 P Standby 172.21.228.3 local 172.21.228.1

Vl269 218 100 P Standby 172.21.230.3 local 172.21.230.1

Vl270 219 110 P Active local 172.21.232.3 172.21.232.1

Vl301 1 110 P Active local 172.21.1.3 172.21.1.1

Vl302 2 100 P Standby 172.21.2.3 local 172.21.2.1

Vl303 3 110 P Active local 172.21.3.3 172.21.3.1

Vl304 4 100 P Standby 172.21.4.3 local 172.21.4.1

Vl305 5 110 P Active local 172.21.5.3 172.21.5.1

Vl306 6 100 P Standby 172.21.6.3 local 172.21.6.1

Vl307 7 110 P Active local 172.21.7.3 172.21.7.1

Vl308 8 100 P Standby 172.21.8.3 local 172.21.8.1

Vl309 9 110 P Active local 172.21.9.3 172.21.9.1

Vl310 10 100 P Standby 172.21.10.3 local 172.21.10.1

Vl311 11 110 P Active local 172.21.11.3 172.21.11.1

Vl312 12 100 P Standby 172.21.12.3 local 172.21.12.1

Vl313 13 110 P Active local 172.21.13.3 172.21.13.1

Vl314 14 100 P Standby 172.21.14.3 local 172.21.14.1

Vl315 15 110 P Active local 172.21.15.3 172.21.15.1

Vl316 16 100 P Standby 172.21.16.3 local 172.21.16.1

Vl317 17 110 P Active local 172.21.17.3 172.21.17.1

Vl318 18 100 P Standby 172.21.18.3 local 172.21.18.1

Vl319 19 110 P Active local 172.21.19.3 172.21.19.1

Vl320 20 100 P Standby 172.21.20.3 local 172.21.20.1

Vl321 21 110 P Active local 172.21.21.3 172.21.21.1

Vl322 22 100 P Standby 172.21.22.3 local 172.21.22.1

Vl323 23 110 P Active local 172.21.23.3 172.21.23.1

Vl324 24 100 P Standby 172.21.24.3 local 172.21.24.1

Vl325 25 110 P Active local 172.21.25.3 172.21.25.1

Vl326 26 100 P Standby 172.21.26.3 local 172.21.26.1

Vl327 27 110 P Active local 172.21.27.3 172.21.27.1

Vl328 28 100 P Standby 172.21.28.3 local 172.21.28.1

Vl330 30 100 P Standby 172.21.30.3 local 172.21.30.1

Vl331 31 110 P Active local 172.21.31.3 172.21.31.1

Vl332 32 100 P Standby 172.21.32.3 local 172.21.32.1

Vl333 33 110 P Active local 172.21.33.3 172.21.33.1

Vl334 34 100 P Standby 172.21.34.3 local 172.21.34.1

Vl335 35 110 P Active local 172.21.35.3 172.21.35.1

Vl336 36 100 P Standby 172.21.36.3 local 172.21.36.1

Vl337 37 110 P Active local 172.21.37.3 172.21.37.1

Vl338 38 100 P Standby 172.21.38.3 local 172.21.38.1

Vl339 39 110 P Active local 172.21.39.3 172.21.39.1

Vl340 40 100 P Standby 172.21.40.3 local 172.21.40.1

Vl341 41 110 P Active local 172.21.41.3 172.21.41.1

Vl342 42 100 P Standby 172.21.42.3 local 172.21.42.1

Vl343 43 110 P Active local 172.21.43.3 172.21.43.1

Vl344 44 100 P Standby 172.21.44.3 local 172.21.44.1

Vl345 45 110 P Active local 172.21.45.3 172.21.45.1

Vl346 46 100 P Standby 172.21.46.3 local 172.21.46.1

Vl347 47 110 P Active local 172.21.47.3 172.21.47.1

Vl348 48 100 P Standby 172.21.48.3 local 172.21.48.1

Vl349 49 110 P Active local 172.21.49.3 172.21.49.1

Vl350 50 100 P Standby 172.21.50.3 local 172.21.50.1

Vl351 51 110 P Active local 172.21.51.3 172.21.51.1

Vl352 52 100 P Standby 172.21.52.3 local 172.21.52.1

Vl368 68 100 P Standby 172.21.68.3 local 172.21.68.1

Vl389 89 110 P Init unknown unknown 172.21.89.1

Vl390 90 100 P Init unknown unknown 172.21.90.1

Vl476 176 100 P Standby 172.21.176.3 local 172.21.176.1

Vl492 92 100 P Standby 172.21.192.3 local 172.21.192.1

Vl499 199 110 P Active local 172.21.199.3 172.21.199.1

Vl500 254 110 P Active local 172.21.29.19 172.21.29.18

Vl555 101 110 P Active local 10.255.255.22 10.255.255.20

Vl556 59 110 P Active local 10.255.255.62 10.255.255.60

Vl557 93 110 P Active local 10.255.255.38 10.255.255.36

Vl558 94 110 P Active local 10.255.255.46 10.255.255.44

Vl729 198 110 P Active local 172.21.198.3 172.21.198.1

Vl900 255 100 P Standby 10.55.75.3 local 10.55.75.1

Vl902 1 110 Active local 172.21.255.3 172.21.255.1

sh spanning-tree blockedports

Name Blocked Interfaces List

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

VLAN0002 Te3/3

VLAN0044 Te3/3

VLAN0360 Te3/3

VLAN0364 Po1, Po2

VLAN0468 Te3/3

Number of blocked ports (segments) in the system : 6

sh spanning-tree vlan 360

VLAN0360

Spanning tree enabled protocol rstp

Root ID Priority 8552

Address 0024.c480.1a40

Cost 1

Port 1666 (Port-channel2)

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 33128 (priority 32768 sys-id-ext 360)

Address 0022.0deb.b800

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Aging Time 250

Interface Role Sts Cost Prio.Nbr Type

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

Te3/3 Altn BLK 2 128.259 P2p

Gi7/38 Desg FWD 4 128.806 P2p

Gi9/39 Desg FWD 4 128.1063 P2p

Gi9/40 Desg FWD 4 128.1064 P2p

Gi9/41 Desg FWD 4 128.1065 P2p

Po1 Desg FWD 1 128.1665 P2p

Po2 Root FWD 1 128.1666 P2p

sh int trunk

Port Mode Encapsulation Status Native vlan

Te3/3 on 802.1q trunking 1

Port Mode Encapsulation Status Native vlan

Gi9/48 on 802.1q trunking 1

Po1 on 802.1q trunking 1

Po2 on 802.1q trunking 1

Port Vlans allowed on trunk

Te3/3 1-4094

Po1 1-4094

Po2 1-4094

Port Vlans allowed and active in management domain

Te3/3 1-2,8-9,11,18,22,26,30,44-45,50,90,101,200,222-223,225,227,231,234,250-263,268-270,301-352,358-360,363-364,368,371-374,389-390,468,476,492,499-500,554-559,729,900-902

Po1 1-2,8-9,11,18,22,26,30,44-45,50,90,101,200,222-223,225,227,231,234,250-263,268-270,301-352,358-360,363-364,368,371-374,389-390,468,476,492,499-500,554-559,729,900-902

Po2 1-2,8-9,11,18,22,26,30,44-45,50,90,101,200,222-223,225,227,231,234,250-263,268-270,301-352,358-360,363-364,368,371-374,389-390,468,476,492,499-500,554-559,729,900-902

Te3/3 1,8-9,11,18,22,26,30,45,50,90,101,200,222-223,225,227,231,234,250-263,268-270,301-352,358-359,363-364,368,371-374,389-390,476,492,499-500,554-559,729,900-902

Po1 1,8-9,11,18,22,26,30,45,50,90,101,200,222-223,225,227,231,234,250-263,268-270,301-352,358-359,363,368,371-374,389-390,476,492,499-500,554-559,729,900-902

Po2 1-2,390

sh vlan brief

VLAN Name Status Ports

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

1 default active Te3/6, Gi7/16, Gi7/21, Gi7/47, Gi9/32, Gi9/33

2 XXX active Gi1/7, Gi1/11

50 TEST_VLAN2 active

90 vlan90 active

101 MANAGEMENT_NEW active

360 VLAN0360 active

900 INTERCON_OLD_NET active

901 Proxy_old_CED active Gi1/40

d.navetto · ‎02-27-2013

hello everybody....

I've solved this issue.....I was right !!!!

The problem was about the Port-channell between the CORE (6509-6513).

For some reasone the BPDU were not advertising ...indeed.... the show int po2 (port-channel master ) trunk showed..

sh int po2 trunk

Port Mode Encapsulation Status Native vlan

Po2 on 802.1q trunking 1

Port Vlans allowed on trunk

Po2 1-4094

Port Vlans allowed and active in management domain

Po2 1-2,8-9,11,18,22,26,30,44-45,50,90,101,200,222-223,225,227,231,234,250-263,268-270,301-352,358-360,363-364,368,371-374,389-390,468,476,492,499-500,554-559,729,900-902

Port Vlans in spanning tree forwarding state and not pruned

Po2 1-2,390

This situation...bloked the forwarding for the Vlan id that aren't there.

thak you so much...

Giuseppe Larosa · ‎02-27-2013

Hello David,

thanks for your feedback on this case.

It was an OSI layer2 issue, nothing related to the presence or absence of an SVI in vlan360 at cat6509 level of devices.

What have you done to fix? the classic shut/no shut to trigger new negotiations and protocol exchanges on the affected port channel?

Best Regards

Giuseppe

d.navetto · ‎02-27-2013

Hello Giuseppe.

Yes i did...

The sh /no sh has forced the new negotiations and the exchanges for protocol LACP.

But the question was why the RSTP didn't work fine ?

The troubleshooting showed me that the forwarding for all Vlans from the 6509 secondary to 6513 were forwarding to the link 10 Gb that should be in the block status, instead the 6509 primary saw as the root spanning tree for any Vlans (ex vlan 360) the Po2.

This made me crazy.....