Hi Eyeryone,
Greeting!
I am wondering how sg300 switch sending bpdu messages for multilpe vlans to it's neighbor switch in order to check spanning tree .
Because i only see spanning tree information for single vlan(vlan1-native) on sg300 while other vlans spanning tree information stated in C2960X switch. Outputs are as follows.
I would appreciate if someone answer my query. Thanks.
Network Setup : Router>>SG300>>C2960>>>>users
SG300#sho spanning-tree
Spanning tree enabled mode RSTP
Default port cost method: long
Loopback guard: Disabled
Root ID Priority 1
Address 2c:ab:eb:3c:ff:00
Cost 20000
Port gi10
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768
Address a0:55:4f:7a:d8:fd
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Number of topology changes 44 last change occurred 176:21:02 ago
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Interfaces
Name State Prio.Nbr Cost Sts Role PortFast Type
--------- -------- --------- -------- ------ ---- -------- -----------------
gi1 enabled 128.49 20000 Frw Desg No P2P (RSTP)
gi2 enabled 128.50 20000 Frw Desg No P2P (RSTP)
gi3 enabled 128.51 20000 Frw Desg No P2P (STP)
gi4 enabled 128.52 20000 Frw Desg No P2P (RSTP)
gi5 enabled 128.53 20000 Frw Desg No P2P (RSTP)
gi6 enabled 128.54 20000 Frw Desg No P2P (RSTP)
gi7 enabled 128.55 20000 Frw Desg No P2P (RSTP)
gi8 enabled 128.56 20000 Frw Desg No P2P (RSTP)
gi9 enabled 128.57 2000000 Dsbl Dsbl No -
gi10 enabled 128.58 20000 Frw Root No P2P (STP)
Po1 enabled 128.1000 20000 Dsbl Dsbl No -
Po2 enabled 128.1001 20000 Dsbl Dsbl No -
Po3 enabled 128.1002 20000 Dsbl Dsbl No -
Po4 enabled 128.1003 20000 Dsbl Dsbl No -
Po5 enabled 128.1004 20000 Dsbl Dsbl No -
Po6 enabled 128.1005 20000 Dsbl Dsbl No -
Po7 enabled 128.1006 20000 Dsbl Dsbl No -
Po8 enabled 128.1007 20000 Dsbl Dsbl No -
SG300# sho int des
Port Description
------- -----------
gi1 SW20
gi2 SW21
gi3 SW22
gi4 SW23
gi5 SW24
gi6 SW25
gi7 SW26
gi8 SW27
gi9 SW28
gi10 Downlink-To-C2960-Switch
===========================================
C2960#sho spanning-tree
VLAN0001
Spanning tree enabled protocol rstp
Root ID Priority 1
Address 2cab.eb3c.ff00
Cost 20004
Port 28 (GigabitEthernet1/0/28)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0076.866e.9680
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi1/0/1 Desg FWD 4 128.1 P2p
Gi1/0/2 Desg FWD 4 128.2 P2p
Gi1/0/3 Desg FWD 4 128.3 P2p
Gi1/0/4 Desg FWD 4 128.4 P2p
Gi1/0/5 Desg FWD 4 128.5 P2p
Gi1/0/6 Desg FWD 4 128.6 P2p
Gi1/0/7 Desg FWD 4 128.7 P2p
Gi1/0/8 Desg FWD 4 128.8 P2p
Gi1/0/9 Desg FWD 4 128.9 P2p
Gi1/0/10 Desg FWD 4 128.10 P2p
Gi1/0/11 Desg FWD 4 128.11 P2p
Gi1/0/12 Desg FWD 4 128.12 P2p
Gi1/0/13 Desg FWD 4 128.13 P2p
Gi1/0/14 Desg FWD 4 128.14 P2p
Gi1/0/15 Desg FWD 4 128.15 P2p
Gi1/0/16 Desg FWD 4 128.16 P2p
Gi1/0/28 Root FWD 4 128.28 P2p
VLAN0002
Spanning tree enabled protocol rstp
Root ID Priority 32770
Address 0076.866e.9680
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32770 (priority 32768 sys-id-ext 2)
Address 0076.866e.9680
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi1/0/1 Desg FWD 4 128.1 P2p
Gi1/0/2 Desg FWD 4 128.2 P2p
Gi1/0/3 Desg FWD 4 128.3 P2p
Gi1/0/4 Desg FWD 4 128.4 P2p
Gi1/0/5 Desg FWD 4 128.5 P2p
Gi1/0/6 Desg FWD 4 128.6 P2p
Gi1/0/7 Desg FWD 4 128.7 P2p
Gi1/0/8 Desg FWD 4 128.8 P2p
Gi1/0/9 Desg FWD 4 128.9 P2p
Gi1/0/10 Desg FWD 4 128.10 P2p
Gi1/0/11 Desg FWD 4 128.11 P2p
Gi1/0/12 Desg FWD 4 128.12 P2p
Gi1/0/13 Desg FWD 4 128.13 P2p
Gi1/0/14 Desg FWD 4 128.14 P2p
Gi1/0/15 Desg FWD 4 128.15 P2p
Gi1/0/16 Desg FWD 4 128.16 P2p
Gi1/0/28 Desg FWD 4 128.28 P2p
VLAN0003
Spanning tree enabled protocol rstp
Root ID Priority 32771
Address 0076.866e.9680
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32771 (priority 32768 sys-id-ext 3)
Address 0076.866e.9680
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi1/0/1 Desg FWD 4 128.1 P2p
Gi1/0/2 Desg FWD 4 128.2 P2p
Gi1/0/3 Desg FWD 4 128.3 P2p
Gi1/0/4 Desg FWD 4 128.4 P2p
Gi1/0/5 Desg FWD 4 128.5 P2p
Gi1/0/6 Desg FWD 4 128.6 P2p
Gi1/0/7 Desg FWD 4 128.7 P2p
Gi1/0/8 Desg FWD 4 128.8 P2p
Gi1/0/9 Desg FWD 4 128.9 P2p
Gi1/0/10 Desg FWD 4 128.10 P2p
Gi1/0/11 Desg FWD 4 128.11 P2p
Gi1/0/12 Desg FWD 4 128.12 P2p
Gi1/0/13 Desg FWD 4 128.13 P2p
Gi1/0/14 Desg FWD 4 128.14 P2p
Gi1/0/15 Desg FWD 4 128.15 P2p
Gi1/0/16 Desg FWD 4 128.16 P2p
Gi1/0/28 Desg FWD 4 128.28 P2p
VLAN0004
Spanning tree enabled protocol rstp
Root ID Priority 32772
Address 0076.866e.9680
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32772 (priority 32768 sys-id-ext 4)
Address 0076.866e.9680
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Gi1/0/28 Desg FWD 4 128.28 P2p
SN4-Supcourt-L8SW28# sho int des
Interface Status Protocol Description
Vl1 up up
Vl3 up up
Vl4 up up
Fa0 admin down down
Gi1/0/1 up up AP1
Gi1/0/2 up up AP2
Gi1/0/3 up up AP3
Gi1/0/4 up up AP4
Gi1/0/5 up up AP5
Gi1/0/6 up up AP6
Gi1/0/7 up up AP7
Gi1/0/8 up up AP8
Gi1/0/9 up up AP9
Gi1/0/10 up up AP10
Gi1/0/11 up up AP11
Gi1/0/12 up up AP12
Gi1/0/13 up up AP13
Gi1/0/14 up up AP14
Gi1/0/15 up up AP15
Gi1/0/16 up up AP16
Gi1/0/17 down down LAN1
Gi1/0/18 down down LAN2
Gi1/0/19 down down LAN3
Gi1/0/20 down down LAN4
Gi1/0/21 down down Customer-LAN-Point
Gi1/0/22 down down Customer-LAN-Point
Gi1/0/23 down down Customer-LAN-Point
Gi1/0/24 down down Customer-LAN-Point
Gi1/0/25 admin down down SHUT
Gi1/0/26 admin down down SHUT
Gi1/0/27 admin down down SHUT
Gi1/0/28 up up UPLINK-To-SG300
C2960#
