Solved: Re: RSTP between Cisco and Procurve switches

malcolmpdwilson · ‎01-05-2011

Hello,

Cisco switches in Core and Dist layers, Procurves in access layer.

Core switch V1CS1 goes down, V2CS1 takes over as STP root.

The Ciscos are running PVRST+ and the Procurves RSTP.

When V2CS1 takes over as the new root, the Procurve switches only reply to proposals on VLAN1.

V2CS1 keeps transmitting proposals on fa0/1 and fa0/2 until the forward delay timer expires.

Fa0/1 and fa0/2 then go into LRN for 15 seconds, then FWD.

This is a terrible delay to have...

I have found one solution: MSTP. This gets <2s reconvergence. But this would involve a lot of reconfiguration work on the production network.

Does anyone have another idea?

Any thoughts are greatly appreciated.

Regards,

Malcolm

S2# sh run

Running configuration:

; J9088A Configuration Editor; Created on release #R.11.30

hostname "S2"

snmp-server community "public" Unrestricted vlan 1

name "DEFAULT_VLAN"

untagged 1-2,6-52

no ip address

no untagged 3-5

exit

vlan 110

name "VLAN110"

untagged 3

tagged 1-2

exit

vlan 220

name "VLAN220"

untagged 4-5

tagged 1-2

exit

spanning-tree

spanning-tree force-version RSTP-operation

S1# sh run

Running configuration:

; J9088A Configuration Editor; Created on release #R.11.30

hostname "S1"

snmp-server community "public" Unrestricted vlan 1

name "DEFAULT_VLAN"

untagged 1-2,4-52

no ip address

no untagged 3

exit

vlan 110

name "VLAN110"

untagged 3

tagged 1-2

exit

spanning-tree

spanning-tree force-version RSTP-operation

V1CS2
spanning-tree mode rapid-pvst
spanning-tree extend system-id
!
spanning-tree vlan 1-1024 priority 4096
!
vlan internal allocation policy ascending
vlan dot1q tag native
!
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan1
no ip address
!
interface Vlan110
ip address 192.168.110.3 255.255.255.0
!
interface Vlan220
ip address 192.168.220.3 255.255.255.0

V1CS1
spanning-tree mode rapid-pvst
spanning-tree logging
spanning-tree extend system-id
!
spanning-tree vlan 1-1024 priority 4096
!
vlan internal allocation policy ascending
vlan dot1q tag native
!
!
interface GigabitEthernet0/2
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface Vlan1
no ip address
!
interface Vlan110
ip address 192.168.110.2 255.255.255.0
!
interface Vlan220
ip address 192.168.220.2 255.255.255.0
!

V2CS1#

V2CS1#sh debug

Spanning Tree:

Spanning Tree event dump debugging is on

Spanning Tree snapshot debugging is on

Spanning Tree event debugging is on

V2CS1#

V2CS1#sh spann root

Root Hello Max Fwd

Vlan Root ID Cost Time Age Dly Root Port

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

VLAN0001 4097 000a.f468.d380 4 2 20 15 Gi0/2

VLAN0110 4206 000a.f468.d380 4 2 20 15 Gi0/2

VLAN0220 4316 000a.f468.d380 4 2 20 15 Gi0/2

V2CS1#

05:50:04: RSTP(1): updt roles, root port Gi0/2 going down

05:50:04: RSTP(1): we become the root bridge

05:50:04: RSTP(1): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.FWD Gi0/2->Root.DIS

05:50:04: RSTP(110): updt roles, root port Gi0/2 going down

05:50:04: RSTP(110): we become the root bridge

05:50:04: RSTP(110): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.FWD Gi0/2->Root.DIS

05:50:04: RSTP(220): updt roles, root port Gi0/2 going down

05:50:04: RSTP(220): we become the root bridge

05:50:04: RSTP(220): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.FWD Gi0/2->Root.DIS

05:50:05: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/2, changed state to down

05:50:06: %LINK-3-UPDOWN: Interface GigabitEthernet0/2, changed state to down

V2CS1#

05:52:11: %LINK-3-UPDOWN: Interface GigabitEthernet0/2, changed state to up

05:52:12: RSTP(1): initializing port Gi0/2

05:52:12: RSTP(1): Gi0/2 is now designated

05:52:12: RSTP(110): initializing port Gi0/2

05:52:12: RSTP(110): Gi0/2 is now designated

05:52:12: RSTP(220): initializing port Gi0/2

05:52:12: RSTP(220): Gi0/2 is now designated

05:52:12: RSTP(1): transmitting a proposal on Gi0/2RSTP(1):

05:52:12: F:DP R:1001.0016.c88b.e600 C:0 B:1001.0016.c88b.e600 P:8032 A:0 T:14.2.F

05:52:12: RSTP(110): transmitting a proposal on Gi0/2RSTP(110):

05:52:12: F:DP R:106E.0016.c88b.e600 C:0 B:106E.0016.c88b.e600 P:8032 A:0 T:14.2.F

05:52:12: RSTP(220): transmitting a proposal on Gi0/2RSTP(220):

05:52:12: F:DP R:10DC.0016.c88b.e600 C:0 B:10DC.0016.c88b.e600 P:8032 A:0 T:14.2.F

05:52:12: RSTP(1): updt roles, received superior bpdu on Gi0/2

05:52:12: RSTP(1): Gi0/2

05:52:12: F:DP R:1001.000a.f468.d380 C:0 B:1001.000a.f468.d380 P:801A A:0 T:14.2.F

05:52:12: RSTP(1): Gi0/2 is now root port

05:52:12: RSTP(1): syncing port Fa0/1

05:52:12: RSTP(1): syncing port Fa0/2

05:52:12: RSTP(1): synced Gi0/2

05:52:12: RSTP(1): snapshot: Fa0/1->Desg.BLK Fa0/2->Desg.BLK Gi0/2->Root.FWD

05:52:12: RSTP(110): updt roles, received superior bpdu on Gi0/2

05:52:12: RSTP(110): Gi0/2

05:52:12: F:DP R:106E.000a.f468.d380 C:0 B:106E.000a.f468.d380 P:801A A:0 T:14.2.F

05:52:12: RSTP(110): Gi0/2 is now root port

05:52:12: RSTP(110): syncing port Fa0/1

05:52:12: RSTP(110): syncing port Fa0/2

05:52:12: RSTP(110): synced Gi0/2

05:52:12: RSTP(110): snapshot: Fa0/1->Desg.BLK Fa0/2->Desg.BLK Gi0/2->Root.FWD

05:52:12: RSTP(220): updt roles, received superior bpdu on Gi0/2

05:52:12: RSTP(220): Gi0/2

05:52:12: F:DP R:10DC.000a.f468.d380 C:0 B:10DC.000a.f468.d380 P:801A A:0 T:14.2.F

05:52:12: RSTP(220): Gi0/2 is now root port

05:52:12: RSTP(220): syncing port Fa0/1

05:52:12: RSTP(220): syncing port Fa0/2

05:52:12: RSTP(220): synced Gi0/2

05:52:12: RSTP(220): snapshot: Fa0/1->Desg.BLK Fa0/2->Desg.BLK Gi0/2->Root.FWD

05:52:12: RSTP(1): transmitting an agreement on Gi0/2 as a response to a proposalRSTP(1):

05:52:12: F:AgFLR R:1001.000a.f468.d380 C:0 B:1001.000a.f468.d380 P:801A A:0 T:14.2.F

05:52:12: RSTP(1): transmitting a proposal on Fa0/1RSTP(1):

05:52:12: F:DP R:1001.000a.f468.d380 C:4 B:1001.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:12: RSTP(1): transmitting a proposal on Fa0/2RSTP(1):

05:52:12: F:DP R:1001.000a.f468.d380 C:4 B:1001.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:12: RSTP(110): transmitting an agreement on Gi0/2 as a response to a proposalRSTP(110):

05:52:12: F:AgFLR R:106E.000a.f468.d380 C:0 B:106E.000a.f468.d380 P:801A A:0 T:14.2.F

05:52:12: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:12: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:12: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:12: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:12: RSTP(220): transmitting an agreement on Gi0/2 as a response to a proposalRSTP(220):

05:52:12: F:AgFLR R:10DC.000a.f468.d380 C:0 B:10DC.000a.f468.d380 P:801A A:0 T:14.2.F

05:52:12: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:12: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:12: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:12: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:12: RSTP(1): received an agreement on Fa0/1

05:52:12: RSTP(1): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.BLK Gi0/2->Root.FWD

05:52:12: RSTP(1): received an agreement on Fa0/2

05:52:12: RSTP(1): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.FWD Gi0/2->Root.FWD

05:52:12: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:12: F:DPTc R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:12: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:12: F:DPTc R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:12: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:12: F:DPTc R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:12: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:12: F:DPTc R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:12: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:12: F:DPTc R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:12: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:12: F:DPTc R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:13: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:13: F:DPTc R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:13: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:13: F:DPTc R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:13: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/2, changed state to up

05:52:14: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:14: F:DPTc R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:14: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:14: F:DPTc R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:15: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:15: F:DPTc R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:15: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:15: F:DPTc R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:16: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:16: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:16: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:16: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:17: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:17: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:17: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:17: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:18: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:18: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:18: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:18: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:19: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:19: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:19: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:19: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:20: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:20: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:20: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:20: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:21: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:21: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:21: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:21: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:22: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:22: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:22: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:22: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:23: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:23: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:23: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:23: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:24: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:24: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:24: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:24: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:25: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:25: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:25: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:25: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:26: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:26: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:26: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:26: F:DP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:27: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:27: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:27: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:27: F:DP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:27: RSTP(110): Fa0/1 fdwhile Expired

05:52:27: RSTP(110): snapshot: Fa0/1->Desg.LRN Fa0/2->Desg.BLK Gi0/2->Root.FWD

05:52:27: RSTP(110): Fa0/2 fdwhile Expired

05:52:27: RSTP(110): snapshot: Fa0/1->Desg.LRN Fa0/2->Desg.LRN Gi0/2->Root.FWD

05:52:27: RSTP(220): Fa0/1 fdwhile Expired

05:52:27: RSTP(220): snapshot: Fa0/1->Desg.LRN Fa0/2->Desg.BLK Gi0/2->Root.FWD

05:52:27: RSTP(220): Fa0/2 fdwhile Expired

05:52:27: RSTP(220): snapshot: Fa0/1->Desg.LRN Fa0/2->Desg.LRN Gi0/2->Root.FWD

05:52:28: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:28: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:28: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:28: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:29: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:29: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:29: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:29: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:30: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:30: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:30: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:30: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:31: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:31: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:31: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:31: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:32: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:32: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:32: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:32: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:33: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:33: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:33: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:33: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:34: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:34: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:34: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:34: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:35: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:35: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:35: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:35: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:36: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:36: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:36: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:36: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:37: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:37: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:37: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:37: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:38: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:38: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:38: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:38: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:39: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:39: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:39: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:39: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:40: RSTP(110): transmitting a proposal on Fa0/1RSTP(110):

05:52:40: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:40: RSTP(110): transmitting a proposal on Fa0/2RSTP(110):

05:52:40: F:LDP R:106E.000a.f468.d380 C:4 B:106E.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:41: RSTP(220): transmitting a proposal on Fa0/1RSTP(220):

05:52:41: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8001 A:100 T:14.2.F

05:52:41: RSTP(220): transmitting a proposal on Fa0/2RSTP(220):

05:52:41: F:LDP R:10DC.000a.f468.d380 C:4 B:10DC.0016.c88b.e600 P:8002 A:100 T:14.2.F

05:52:42: RSTP(110): Fa0/1 fdwhile Expired

05:52:42: RSTP(110): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.LRN Gi0/2->Root.FWD

05:52:42: RSTP(110): Fa0/2 fdwhile Expired

05:52:42: RSTP(110): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.FWD Gi0/2->Root.FWD

05:52:42: RSTP(220): Fa0/1 fdwhile Expired

05:52:42: RSTP(220): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.LRN Gi0/2->Root.FWD

05:52:42: RSTP(220): Fa0/2 fdwhile Expired

05:52:42: RSTP(220): snapshot: Fa0/1->Desg.FWD Fa0/2->Desg.FWD Gi0/2->Root.FWD

V2CS1#

j-marenda · ‎01-05-2011

Malcolm,

i had many happy hours and lot of fun with this ;-(

The only one longer term working way for HP Procurve, 3COM/H3C and Cisco Switches to cooperate is using MSTP .

Remember that you *must* create identical Istance Configuration.

You should assign VLAN (ranges) to those instances to be able to add vlans in the future without

Problems. On Cisco, those vlans must not exist, on HP, they must .

Changing the MST Instance configuration will interrupt service !

So create a bunch of vlans for the future; on HP, first increase the limit, reboot, then add more vlans.

remember that the VT100 vlan management is limited to the number of vlans,

so you should use the CLI for work.

just my $ 0.01

Juergen.

View solution in original post

Bastien Migette · ‎01-07-2011

Hello Malcolm,

You have to know that cisco use a prioprietary implementation of STP and RSTP, which are Per-VLAN spanning tree. As the standard protocol don't define a vlan ID field in BPDU, cisco code it in lower bits of the priority field, and then if you have X vlans on a trunk link, it will send X BPDU

This is in case of the use of the extended system id (spanning-tree extend system-id), which is enabled by default, otherwise it will use different mac addresses for the switch, so it might be seen as multiple switches by non Per vlan STP switches.

Standard spanning tree breaks physical loops, whereas per vlan breaks logical loops, so it might lead to a situation where physical and logical topologies are not the same, but as the HP switch only think there's only physical it can cut L1 links or do not cut then leading to loops or network outage.

In the end, you might succeed making HP and CISCO STP working together, but the most effective and stable solution would be to use MSTP which is a standard implementation.

I hope this is clear for you

View solution in original post

j-marenda · ‎01-05-2011

Malcolm,

i had many happy hours and lot of fun with this ;-(

The only one longer term working way for HP Procurve, 3COM/H3C and Cisco Switches to cooperate is using MSTP .

Remember that you *must* create identical Istance Configuration.

You should assign VLAN (ranges) to those instances to be able to add vlans in the future without

Problems. On Cisco, those vlans must not exist, on HP, they must .

Changing the MST Instance configuration will interrupt service !

So create a bunch of vlans for the future; on HP, first increase the limit, reboot, then add more vlans.

remember that the VT100 vlan management is limited to the number of vlans,

so you should use the CLI for work.

just my $ 0.01

Juergen.

malcolmpdwilson · ‎01-06-2011

Hi Jürgen,

great info, thanks, but how frustrating having to plan the VLAN ranges in advance or suffer a break! But I suspected this may be the only way...unless anyone knows anything else?

Regards,

Malcolm

Bastien Migette · ‎01-07-2011

Hello Malcolm,

You have to know that cisco use a prioprietary implementation of STP and RSTP, which are Per-VLAN spanning tree. As the standard protocol don't define a vlan ID field in BPDU, cisco code it in lower bits of the priority field, and then if you have X vlans on a trunk link, it will send X BPDU

This is in case of the use of the extended system id (spanning-tree extend system-id), which is enabled by default, otherwise it will use different mac addresses for the switch, so it might be seen as multiple switches by non Per vlan STP switches.

Standard spanning tree breaks physical loops, whereas per vlan breaks logical loops, so it might lead to a situation where physical and logical topologies are not the same, but as the HP switch only think there's only physical it can cut L1 links or do not cut then leading to loops or network outage.

In the end, you might succeed making HP and CISCO STP working together, but the most effective and stable solution would be to use MSTP which is a standard implementation.

I hope this is clear for you

malcolmpdwilson · ‎01-07-2011

Hi Bastien,

Thanks for the explanation - the Procurves don't respond to BPDUs with the extended system-ID used by PVST. I can't turn off extended system-id on my switches so I'll have to go with MSTP.

It's been an interesting exercise, thanks for your help, Bastien and Jürgen!

Regards,

Malcolm

VNi · ‎02-02-2021

I configured bpdufilter on trunk btw HP and Cisco and solve the issue temporary in migration phase from HP to Cisco. Not the best solution but works for me.