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5鸿鹄币
比如说这张拓扑图,要保证这三台交换机在一个域内,要保证以下配置参数完全一致:域名、revision、instance(编号)一致、instance下挂载的VLAN完全一致。
但是我就是在满足这几个条件的前提下去配置这三台交换机,在IOU1上我看到了包括0在内的4个实例,但是在其余两台交换机上却没有看到,请问这是怎么回事?
直接接口全部为UP状态。
IOU1#show running-config | section spanning-tree mst
spanning-tree mst configuration
name CCIE
revision 10
instance 1 vlan 1-10
instance 2 vlan 11-20
instance 3 vlan 21-30
IOU1#
IOU2#show running-config | section spanning-tree mst
spanning-tree mst configuration
name CCIE
revision 10
instance 1 vlan 1-10
instance 2 vlan 11-20
instance 3 vlan 21-30
IOU2#
IOU3# show running-config | section spanning-tree mst
spanning-tree mst configuration
name CCIE
revision 10
instance 1 vlan 1-10
instance 2 vlan 11-20
instance 3 vlan 21-30
IOU3#
以下是三台交换机的show spanning-tree信息:
IOU1# show spanning-tree mst
##### MST0 vlans mapped: 31-4094
Bridge address aabb.cc00.0100 priority 32768 (32768 sysid 0)
Root this switch for the CIST
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
---------------- ---- --- --------- -------- --------------------------------
Et0/0 Desg FWD 2000000 128.1 Shr
Et0/1 Desg FWD 2000000 128.2 Shr
Et0/2 Desg FWD 2000000 128.3 Shr
Et0/3 Desg FWD 2000000 128.4 Shr
Et1/0 Desg FWD 2000000 128.5 Shr
Et1/1 Desg FWD 2000000 128.6 Shr
Et1/2 Desg FWD 2000000 128.7 Shr
Et1/3 Desg FWD 2000000 128.8 Shr
Et2/0 Desg FWD 2000000 128.9 Shr
Et2/1 Desg FWD 2000000 128.10 Shr
Et2/2 Desg FWD 2000000 128.11 Shr
Et2/3 Desg FWD 2000000 128.12 Shr
Et3/0 Desg FWD 2000000 128.13 Shr
Et3/1 Desg FWD 2000000 128.14 Shr
Et3/2 Desg FWD 2000000 128.15 Shr
Et3/3 Desg FWD 2000000 128.16 Shr
##### MST1 vlans mapped: 1-10
Bridge address aabb.cc00.0100 priority 32769 (32768 sysid 1)
Root this switch for MST1
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Et0/0 Desg FWD 2000000 128.1 Shr
Et0/1 Desg FWD 2000000 128.2 Shr
Et0/2 Desg FWD 2000000 128.3 Shr
Et0/3 Desg FWD 2000000 128.4 Shr
Et1/0 Desg FWD 2000000 128.5 Shr
Et1/1 Desg FWD 2000000 128.6 Shr
Et1/2 Desg FWD 2000000 128.7 Shr
Et1/3 Desg FWD 2000000 128.8 Shr
Et2/0 Desg FWD 2000000 128.9 Shr
Et2/1 Desg FWD 2000000 128.10 Shr
Et2/2 Desg FWD 2000000 128.11 Shr
Et2/3 Desg FWD 2000000 128.12 Shr
Et3/0 Desg FWD 2000000 128.13 Shr
Et3/1 Desg FWD 2000000 128.14 Shr
Et3/2 Desg FWD 2000000 128.15 Shr
Et3/3 Desg FWD 2000000 128.16 Shr
##### MST2 vlans mapped: 11-20
Bridge address aabb.cc00.0100 priority 32770 (32768 sysid 2)
Root this switch for MST2
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Et1/1 Desg FWD 2000000 128.6 Shr
Et1/3 Desg FWD 2000000 128.8 Shr
##### MST3 vlans mapped: 21-30
Bridge address aabb.cc00.0100 priority 32771 (32768 sysid 3)
Root this switch for MST3
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Et1/1 Desg FWD 2000000 128.6 Shr
Et1/3 Desg FWD 2000000 128.8 Shr
IOU1#
IOU2#show spanning-tree mst
##### MST0 vlans mapped: 31-4094
Bridge address aabb.cc00.0200 priority 32768 (32768 sysid 0)
Root address aabb.cc00.0100 priority 32768 (32768 sysid 0)
port Et1/1 path cost 0
Regional Root address aabb.cc00.0100 priority 32768 (32768 sysid 0)
internal cost 2000000 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
---------------- ---- --- --------- -------- --------------------------------
Et0/0 Desg FWD 2000000 128.1 Shr
Et0/1 Desg FWD 2000000 128.2 Shr
Et0/2 Desg FWD 2000000 128.3 Shr
Et0/3 Desg FWD 2000000 128.4 Shr
Et1/0 Desg FWD 2000000 128.5 Shr
Et1/1 Root FWD 2000000 128.6 Shr
Et1/2 Desg FWD 2000000 128.7 Shr
Et1/3 Desg FWD 2000000 128.8 Shr
Et2/0 Desg FWD 2000000 128.9 Shr
Et2/1 Desg FWD 2000000 128.10 Shr
Et2/2 Desg FWD 2000000 128.11 Shr
Et2/3 Desg FWD 2000000 128.12 Shr
Et3/0 Desg FWD 2000000 128.13 Shr
Et3/1 Desg FWD 2000000 128.14 Shr
Et3/2 Desg FWD 2000000 128.15 Shr
Et3/3 Desg FWD 2000000 128.16 Shr
##### MST1 vlans mapped: 1-10
Bridge address aabb.cc00.0200 priority 32769 (32768 sysid 1)
Root address aabb.cc00.0100 priority 32769 (32768 sysid 1)
port Et1/1 cost 2000000 rem hops 19
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Et0/0 Desg FWD 2000000 128.1 Shr
Et0/1 Desg FWD 2000000 128.2 Shr
Et0/2 Desg FWD 2000000 128.3 Shr
Et0/3 Desg FWD 2000000 128.4 Shr
Et1/0 Desg FWD 2000000 128.5 Shr
Et1/1 Root FWD 2000000 128.6 Shr
Et1/2 Desg FWD 2000000 128.7 Shr
Et1/3 Desg FWD 2000000 128.8 Shr
Et2/0 Desg FWD 2000000 128.9 Shr
Et2/1 Desg FWD 2000000 128.10 Shr
Et2/2 Desg FWD 2000000 128.11 Shr
Et2/3 Desg FWD 2000000 128.12 Shr
Et3/0 Desg FWD 2000000 128.13 Shr
Et3/1 Desg FWD 2000000 128.14 Shr
Et3/2 Desg FWD 2000000 128.15 Shr
Et3/3 Desg FWD 2000000 128.16 Shr
IOU2#
IOU3#show spanning-tree mst
##### MST0 vlans mapped: 31-4094
Bridge address aabb.cc00.0300 priority 32768 (32768 sysid 0)
Root address aabb.cc00.0100 priority 32768 (32768 sysid 0)
port Et1/3 path cost 0
Regional Root address aabb.cc00.0100 priority 32768 (32768 sysid 0)
internal cost 2000000 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
---------------- ---- --- --------- -------- --------------------------------
Et0/0 Desg FWD 2000000 128.1 Shr
Et0/1 Desg FWD 2000000 128.2 Shr
Et0/2 Desg FWD 2000000 128.3 Shr
Et0/3 Desg FWD 2000000 128.4 Shr
Et1/0 Desg FWD 2000000 128.5 Shr
Et1/1 Desg FWD 2000000 128.6 Shr
Et1/2 Altn BLK 2000000 128.7 Shr
Et1/3 Root FWD 2000000 128.8 Shr
Et2/0 Desg FWD 2000000 128.9 Shr
Et2/1 Desg FWD 2000000 128.10 Shr
Et2/2 Desg FWD 2000000 128.11 Shr
Et2/3 Desg FWD 2000000 128.12 Shr
Et3/0 Desg FWD 2000000 128.13 Shr
Et3/1 Desg FWD 2000000 128.14 Shr
Et3/2 Desg FWD 2000000 128.15 Shr
Et3/3 Desg FWD 2000000 128.16 Shr
##### MST1 vlans mapped: 1-10
Bridge address aabb.cc00.0300 priority 32769 (32768 sysid 1)
Root address aabb.cc00.0100 priority 32769 (32768 sysid 1)
port Et1/3 cost 2000000 rem hops 19
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Et0/0 Desg FWD 2000000 128.1 Shr
Et0/1 Desg FWD 2000000 128.2 Shr
Et0/2 Desg FWD 2000000 128.3 Shr
Et0/3 Desg FWD 2000000 128.4 Shr
Et1/0 Desg FWD 2000000 128.5 Shr
Et1/1 Desg FWD 2000000 128.6 Shr
Et1/2 Altn BLK 2000000 128.7 Shr
Et1/3 Root FWD 2000000 128.8 Shr
Et2/0 Desg FWD 2000000 128.9 Shr
Et2/1 Desg FWD 2000000 128.10 Shr
Et2/2 Desg FWD 2000000 128.11 Shr
Et2/3 Desg FWD 2000000 128.12 Shr
Et3/0 Desg FWD 2000000 128.13 Shr
Et3/1 Desg FWD 2000000 128.14 Shr
Et3/2 Desg FWD 2000000 128.15 Shr
Et3/3 Desg FWD 2000000 128.16 Shr
IOU3#
可以看出,在IOU1上三个实例都有,那为什么在IOU2和3上只有实例0、1没有2和3呢?
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