[c-nsp] MSTP between Cisco / Brocade

[Randy]

--- On Wed, 4/25/12, Steven Raymond <sraymond at acedatacenter.com> wrote:


From: Steven Raymond <sraymond at acedatacenter.com>
Subject: Re: [c-nsp] MSTP between Cisco / Brocade
To: "Randy" <randy_94108 at yahoo.com>
Cc: "cisco-nsp Service Providers" <cisco-nsp at puck.nether.net>
Date: Wednesday, April 25, 2012, 3:03 PM






On Apr 25, 2012, at 3:55 PM, Randy wrote:

I am not clear if you have 802.1s OR 802-1w enabled on the Brocade(care to post the stp output from Brocade?)

sh run | i mstp


mstp name acedc                           
mstp revision 1
mstp instance 0 vlan 1 to 4090
mstp start







telnet at ar04.prov#show mstp detail 
MSTP Instance 0 (CIST) - VLAN Scope: 1 to 4090 
----------------------------------------------------------------------------
  Bridge: 80000024389c3d00 [Priority 32768, SysId 0, Mac 0024389c3d00]
  FwdDelay 15, HelloTime 2, MaxHops 20, TxHoldCount 6


Port 2/1 - Role: DESIGNATED - State: FORWARDING
  PathCost 2000, Priority 128, OperEdge T, OperPt2PtMac F, Boundary N/A
  Designated   - Root 80000024389c3d00, RegionalRoot 80000024389c3d00,
                 Bridge 80000024389c3d00, ExtCost 0, IntCost 0
  ActiveTimers - helloWhen 2
  MachineState - PRX-DISCARD, PTX-IDLE, PPM-SENDING_RSTP, PIM-CURRENT
                 PRT-ACTIVE_PORT, PST-FORWARDING, TCM-INACTIVE
  BPDUs        - Rcvd MST 0, RST 0, Config 0, TCN 0
                 Sent MST 11, RST 0, Config 0, TCN 0





telnet at ar04.prov#sh spanning-tree 
telnet at ar04.prov#show rstp
telnet at ar04.prov#


That helpful?


Thanks!
 
 
Yes & No.
Yes: both devices are running 802.1s
 
No:  Because of outputs posted:
 
Output from Brocade-above:
"Bridge: 80000024389c3d00 [Priority 32768, SysId 0, Mac 0024389c3d00]"
 
Output from Cisco:
Port 4 (TenGigabitEthernet1/4) of MST0 is designated
blocking (dispute)
Port path cost 2000, Port priority 128,
Port Identifier 128.4.
Designated root has priority 16384,
address 0015.62b7.0dc0
Designated bridge has priority 16384,
address 0015.62b7.0dc0
 
 
Who is:
 
0015.62b7.0dc0 with a bridge-priority of 16384?
 
That is the "who" the cisco is blocking.
 
>From Brocade-output above:
 
Bridge: 80000024389c3d00 [Priority 32768, SysId 0, Mac 0024389c3d00]

./Randy