11-16-2010 05:27 AM - edited 03-06-2019 02:04 PM
Hi,
I'm trying to configure un STP between a linksys SRW2024 and a cisco catalyst 3560, I connect the two switch with 2 wires.
I already search here but nothing seems like my problem.
First at all, seems working well, stp block a port.
But if i try to cut some link, sometime work really well and sometime really bad => In fact the both switch are Root !
I have tried to change the mode of the cisco to a more standard way but can't find the right solution for now.
Any suggestions ?
Regards.
PS:Here the conf:
cisco:
spanning-tree mode rapid-pvst
spanning-tree loopguard default
no spanning-tree optimize bpdu transmission
spanning-tree etherchannel guard misconfig
spanning-tree vlan 1-1000 priority 0
Linksys:
spanning-tree
spanning-tree mode rstp
spanning-tree priority 4096
spanning-tree pathcost method short
And the log:
cisco:
show spanning-tree vlan 140
VLAN0140
Spanning tree enabled protocol rstp
Root ID Priority 140
Address 0015.63c4.ef00
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 140 (priority 0 sys-id-ext 140)
Address 0015.63c4.ef00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Linksys:
show spanning-tree
Spanning tree enabled mode RSTP
Default port cost method: short
Root ID Priority 4096
Address 00:22:6b:bf:f6:eb
This switch is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Solved! Go to Solution.
11-20-2010 02:18 AM
Hi Vincent,
the both Spanning-tree modes are not compatible.
change the mode on both switches to the same at least.
I know a nice discussen, maybe it is also interessted for you:
https://learningnetwork.cisco.com/message/81575
regards,
Sebastian
11-20-2010 02:18 AM
Hi Vincent,
the both Spanning-tree modes are not compatible.
change the mode on both switches to the same at least.
I know a nice discussen, maybe it is also interessted for you:
https://learningnetwork.cisco.com/message/81575
regards,
Sebastian
03-06-2012 05:02 AM
Hi Sebastian,
First at all, sorry for the delay, just have some time to test it again.
You're obviously right.
The option I have:
Cisco:(config)#spanning-tree mode ?
mst Multiple spanning tree mode
pvst Per-Vlan spanning tree mode
rapid-pvst Per-Vlan rapid spanning tree mode
Linksys:(config)# spanning-tree mode
stp Specify IEEE 802.1D Spanning Tree Protocol
rstp Configure IEEE 802.1W Rapid Spanning Tree Protocol
mstp Configure IEEE 802.1S Multiple Spanning Tree Protocol
In the link you send me:
Based on the original IEEE 802.1w standard, RSTP can have multiple VLANs 10, 20, 20 and 40 but will only have a
single instance of spanning tree running for all VLANs, just like the Traditional STP 802.1D (CST). The IEEE 802.1w RSTP standard does not support multiple instances of STP, it does support multiple VLANs. Cisco's version of RSTP, known as RPVST+, combines RSTP with PVST+, and uses a separate instance of spanning tree for each VLAN, just like their proprietary PVST+.
For now, thought I could try the mstp/mst solutions, but I will keep it simple,
so I will try the rapid-pvst/stp solution, and I will comment you.
Best regards.
07-10-2012 06:43 AM
So, a lot of time later, but with the homework done.
The Cisco "rapid-pvst" and the linksys "stp" mode are fully compatible. (Sure with the 14 second of delay).
Best regards.
Configuration used:
Cisco:
spanning-tree mode rapid-pvst
spanning-tree loopguard default
no spanning-tree optimize bpdu transmission
spanning-tree etherchannel guard misconfig
spanning-tree extend system-id
spanning-tree vlan 1-1000 priority 0
!
interface FastEthernet0/9
description lliure
switchport access vlan 10
switchport mode access
spanning-tree portfast
spanning-tree link-type point-to-point
!
interface FastEthernet0/10
description lliure
switchport access vlan 10
switchport mode access
spanning-tree portfast
spanning-tree link-type point-to-point
Linksys:
spanning-tree
spanning-tree priority 4096
spanning-tree pathcost method short
interface range ethernet g(11-24)
spanning-tree portfast
exit
interface range ethernet g(9-10)
spanning-tree link-type point-to-point
Exemple:
# sh spanning-tree
Spanning tree enabled mode STP
Default port cost method: short
Root ID Priority 10
Address 00:15:63:c4:ef:00
Cost 19
Port g9
sw-test01#sh spanning-tree vlan 10
VLAN0010
Spanning tree enabled protocol rstp
Root ID Priority 10
Address 0015.63c4.ef00
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 10 (priority 0 sys-id-ext 10)
Address 0015.63c4.ef00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/8 Desg FWD 19 128.10 P2p Edge
Fa0/9 Desg FWD 19 128.11 P2p Peer(STP)
Fa0/10 Desg FWD 19 128.12 P2p Peer(STP)
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