perplexing mst issue - mst bpdu's are advertised but not

To all those smarter than me...I need some ideas here!

I have four switches in a full mesh with default port priority and cost.
Sw1 and sw3 are in REGION-1 and Sw2 and Sw4 are in REGION-2. Region-1 mst
has vlands 0,12,and 16 mapped to instance 1 and vlans 20,30,35 and 40 to
instace 2. Region-2 has the vlans mapped to the opposite instance.

Sw 3 is configured for the MST root for mst0, 1, and 2.

Sw2 and 4 show that sw3 is the root for all three instances.

Sw1 on the other hand has itself as the root for instance 1 and 2, BUT Sw3
as the root for instance 0. At the bottom are the debugs that show sw3
sending mst bpdus for mst 0,1 and 2 BUT sw 1 only receiving the mst 0 bpdus.

*SW2#sh run *

*SW2#sr | b mst
spanning-tree mode mst
spanning-tree etherchannel guard misconfig
spanning-tree extend system-id
!
spanning-tree mst configuration
 name REGION-2
 revision 1
 instance 1 vlan 20, 30, 35, 40
 instance 2 vlan 10, 12, 16
!*

*SW2#sh spa mst*

##### MST0 vlans mapped: 1-9,11,13-15,17-19,21-29,31-34,36-39,41-4094
Bridge address 0017.94d8.0980 priority 32768 (32768 sysid 0)
Root address 0018.b98e.1d80 priority 24576 (24576 sysid 0)
              port Fa0/21 path cost 0
Regional Root address 0018.b98e.1d80 priority 24576 (24576 sysid 0)
                                      internal cost 200000 rem hops 19
Operational hello time 2 , forward delay 15, max age 20, txholdcount 6
Configured hello time 2 , forward delay 15, max age 20, max hops 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- --------
--------------------------------
Fa0/1 Desg FWD 200000 128.3 P2p
Fa0/4 Desg FWD 200000 128.6 P2p
Fa0/19 Altn BLK 200000 128.21 P2p
Fa0/20 Altn BLK 200000 128.22 P2p
Fa0/21 Root FWD 200000 128.23 P2p
Fa0/23 Desg FWD 200000 128.25 P2p Bound(PVST)
##### MST1 vlans mapped: 20,30,35,40
Bridge address 0017.94d8.0980 priority 32769 (32768 sysid 1)
Root address 0018.b98e.1d80 priority 24577 (24576 sysid 1)
              port Fa0/21 cost 200000 rem hops 19

Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- --------
--------------------------------
Fa0/4 Desg FWD 200000 128.6 P2p
Fa0/19 Altn BLK 200000 128.21 P2p
Fa0/21 Root FWD 200000 128.23 P2p
Fa0/23 Desg FWD 200000 128.25 P2p Bound(PVST)
##### MST2 vlans mapped: 10,12,16
Bridge address 0017.94d8.0980 priority 32770 (32768 sysid 2)
Root address 0018.b98e.1d80 priority 24578 (24576 sysid 2)
              port Fa0/21 cost 200000 rem hops 19
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- --------
--------------------------------
Fa0/1 Desg FWD 200000 128.3 P2p
Fa0/19 Altn BLK 200000 128.21 P2p
Fa0/20 Altn BLK 200000 128.22 P2p
*Fa0/21 Root FWD 200000 128.23 P2p - uplink to Sw3*
Fa0/23 Desg FWD 200000 128.25 P2p Bound(PVST)

*SW3#*sh span root
                                        Root Hello Max Fwd

MST Instance Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
MST0 24576 0018.b98e.1d80 0 2 20
15
MST1 24577 0018.b98e.1d80 0 2 20
15
MST2 24578 0018.b98e.1d80 0 2 20 15

*SW3# sh run*

SW3#sr | b mst
spanning-tree mode mst
spanning-tree etherchannel guard misconfig
spanning-tree extend system-id
!
spanning-tree mst configuration
 name REGION-2
 revision 1
 instance 1 vlan 20, 30, 35, 40
 instance 2 vlan 10, 12, 16
!
spanning-tree mst 0-2 priority 24576

* The problem child is sw1.*

Notice that I even tried bumping up the priority for all three instances to
see if I could push sw into relinquishing the root status for instance 1 and
2. The odd thing is that for instance 0 sw1 is using sw3 as the root, but
not for instance 1 or 2. So I moved on to some debugging.

SW1#sho run | begi mst
spanning-tree mode mst
spanning-tree etherchannel guard misconfig
spanning-tree extend system-id
!
spanning-tree mst configuration
 name REGION-1
 revision 1
 instance 1 vlan 10, 12, 16
 instance 2 vlan 20, 30, 35, 40
!
spanning-tree mst 0-2 priority 61440

SW1#sho sp mst
##### MST0 vlans mapped: 1-9,11,13-15,17-19,21-29,31-34,36-39,41-4094
Bridge address 0019.e780.4400 priority 61440 (61440 sysid 0)
Root address 0018.b98e.1d80 priority 24576 (24576 sysid 0)
              port Fa0/19 path cost 200000
Regional Root this switch
Operational hello time 2 , forward delay 15, max age 20, txholdcount 6
Configured hello time 2 , forward delay 15, max age 20, max hops 20
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- --------
--------------------------------
Fa0/2 Desg FWD 200000 128.4 P2p
Fa0/3 Desg FWD 200000 128.5 P2p
Fa0/5 Desg FWD 200000 128.7 P2p
Fa0/6 Desg FWD 200000 128.8 P2p
Fa0/19 Root FWD 200000 128.21 P2p Bound(RSTP)
Fa0/21 Altn BLK 200000 128.23 P2p Bound(RSTP)
Fa0/23 Altn BLK 200000 128.25 P2p Bound(RSTP)

##### MST1 vlans mapped: 10,12,16
Bridge address 0019.e780.4400 priority 61441 (61440 sysid 1)
Root this switch for MST1
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- --------
--------------------------------
Fa0/2 Desg FWD 200000 128.4 P2p
Fa0/5 Desg FWD 200000 128.7 P2p
Fa0/6 Desg FWD 200000 128.8 P2p
Fa0/19 Mstr FWD 200000 128.21 P2p Bound(RSTP)
Fa0/21 Altn BLK 200000 128.23 P2p Bound(RSTP)
Fa0/23 Altn BLK 200000 128.25 P2p Bound(RSTP)

##### MST2 vlans mapped: 20,30,35,40
Bridge address 0019.e780.4400 priority 61442 (61440 sysid 2)
Root this switch for MST2
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- --------
--------------------------------
Fa0/3 Desg FWD 200000 128.5 P2p
Fa0/5 Desg FWD 200000 128.7 P2p
Fa0/6 Desg FWD 200000 128.8 P2p
Fa0/19 Mstr FWD 200000 128.21 P2p Bound(RSTP)
Fa0/21 Altn BLK 200000 128.23 P2p Bound(RSTP)
Fa0/23 Altn BLK 200000 128.25 P2p Bound(RSTP)

**
*So I did a debug on fa0/19 on both Sw1 and Sw3. On Sw3 I see the mst bpdu
for instance 0,1,and 2 advertised. On Sw1 I only see bpdu's for MST0. Any
ideas?*

*This is sw3 sending:*

SW3#T[2]: Bridge_ID:24578.0018.b98e.1d80 Port_id:149
*Mar 1 00:53:18.215: MST[0]:-TX> Fa0/19 BPDU Prot:0 Vers:3 Type:2
*Mar 1 00:53:18.215: MST[0]: Role :Desg Flags[AFL] Age:0 RemHops:20
*Mar 1 00:53:18.215: MST[0]: CIST_root:24576.0018.b98e.1d80 Cost :0
*Mar 1 00:53:18.215: MST[0]: Reg_root :24576.0018.b98e.1d80 Cost :0
*Mar 1 00:53:18.215: MST[0]: Bridge_ID:24576.0018.b98e.1d80 Port_ID:32789
*Mar 1 00:53:18.215: MST[0]: max_age:20 hello:2 fwdelay:15
*Mar 1 00:53:18.215: MST
SW3#[0]: V3_len:96 region:REGION-2 rev:1 Num_mrec: 2
*Mar 1 00:53:18.215: MST[1]:-TX> Fa0/19 MREC
*Mar 1 00:53:18.215: MST[1]: Role :Desg Flags[AFL] RemHops:20
*Mar 1 00:53:18.215: MST[1]: Root_ID :24577.0018.b98e.1d80 Cost :0
*Mar 1 00:53:18.215: MST[1]: Bridge_ID:24577.0018.b98e.1d80 Port_id:149
*Mar 1 00:53:18.215: MST[2]:-TX> Fa0/19 MREC
*Mar 1 00:53:18.215: MST[2]: Role :Desg Flags[AFL] RemHops:20
SW3#un all:53:18.215: MST[2]: Root_ID :24578.0018.b98e.1d80 Cost :0
*Mar 1 00:53:18.215: MST[2]: Bridge_ID:24578.0018.b98e.1d80 Port_id:149

This is sw1 receiving

 SW1# deb span ms bp re
MSTP BPDUs RECEIVEd dump debugging is on
SW1#
SW1#
SW1#
SW1#
*Mar 1 00:41:44.360: MST[0]:<RX- Fa0/19 repeated designated BPDU Prot:0
Vers:3 Type:2
*Mar 1 00:41:44.360: MST[0]: Role :Desg Flags[AFL] Age:0 RemHops:20
*Mar 1 00:41:44.360: MST[0]: CIST_root:24576.0018.b98e.1d80 Cost :0
*Mar 1 00:41:44.360: MST[0]: Reg_root :24576.0018.b98e.1d80 Cost :0
*Mar 1 00:41:44.360: MST[0]: Bridge_ID:24576.0018.b98e.1d80 Port_ID:32789
*Mar 1 00:41:44.360: MST[0]: max_age:20 hello:2 fwdelay:15
*Mar 1 00:41:44.360: MST[0]: V3_len:96 region:REGION-
SW1#2 rev:1 Num_mrec: 2
SW1#
*Mar 1 00:41:46.373: MST[0]:<RX- Fa0/19 repeated designated BPDU Prot:0
Vers:3 Type:2
*Mar 1 00:41:46.373: MST[0]: Role :Desg Flags[AFL] Age:0 RemHops:20
*Mar 1 00:41:46.373: MST[0]: CIST_root:24576.0018.b98e.1d80 Cost :0
*Mar 1 00:41:46.373: MST[0]: Reg_root :24576.0018.b98e.1d80 Cost :0
*Mar 1 00:41:46.373: MST[0]: Bridge_ID:24576.0018.b98e.1d80 Port_ID:32789
*Mar 1 00:41:46.373: MST[0]: max_age:20 hello:2 fwdelay:15
*Mar 1 00:41:46.373: MST[0]: V3_len:96 region:REGION-
SW1#2 rev:1 Num_mrec: 2
SW1#
*Mar 1 00:41:48.386: MST[0]:<RX- Fa0/19 repeated designated BPDU Prot:0
Vers:3 Type:2
*Mar 1 00:41:48.386: MST[0]: Role :Desg Flags[AFL] Age:0 RemHops:20
*Mar 1 00:41:48.386: MST[0]: CIST_root:24576.0018.b98e.1d80 Cost :0
*Mar 1 00:41:48.386: MST[0]: Reg_root :24576.0018.b98e.1d80 Cost :0
*Mar 1 00:41:48.386: MST[0]: Bridge_ID:24576.0018.b98e.1d80 Port_ID:32789
*Mar 1 00:41:48.386: MST[0]: max_age:20 hello:2 fwdelay:15
*Mar 1 00:41:48.386: MST[0]: V3_len:96 region:REGION-
SW1#2 rev:1 Num_mrec: 2

-- 
r/
LG
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