Hi All,
Kindly need someone to verify if my MSTP is correctly behaviour or not. My Question why on the Access Switch the another link is block? Is it MSTP means both link will be forwarding? Thanks and appreciate someone feedback.
http://www.juniper.net/techpubs/en_US/junos11.4/topics/example/spanning-trees-ex-series-mstp-configuring.html
Core 1
root@CSW01# run show configuration protocols mstp
configuration-name TEST;
revision-level 1;
bridge-priority 4k;
interface xe-1/0/3 { ----------------------------------> To Aceess Switch
cost 1000;
mode point-to-point;
}
interface ae0 { ----------------------------------------------> To Core 2 (back-to-back)
cost 1000;
mode point-to-point;
}
msti 1 {
bridge-priority 4k;
vlan [ 61 62 63 64 65 66 67 68 80 81 83 91 100 101 102 103 104 123 142 202 254 401 402 999 400 ];
}
msti 2 {
bridge-priority 8k;
vlan [ 70 71 72 73 74 75 76 77 78 79 ];
}
CORE 2
root@CSW02# run show configuration protocols mstp
configuration-name TEST;
revision-level 1;
bridge-priority 8k;
interface xe-1/0/3 { -------------------------->to Access Switch
cost 1000;
mode point-to-point;
}
interface ae0 { --------------------------------------------------> To Core 1 (Back-to-back)
cost 1000;
mode point-to-point;
}
msti 1 {
bridge-priority 4k;
vlan [ 61 62 63 64 65 66 67 68 80 81 83 91 100 101 102 103 104 123 142 202 254 401 402 999 400 ];
}
msti 2 {
bridge-priority 8k;
vlan [ 70 71 72 73 74 75 76 77 78 79 ];
}
Access Switch
root@DBKL-3-R1-FSW# run show configuration protocols mstp
configuration-name DBKL;
revision-level 1;
interface xe-0/1/0.0 { ----------------> to Core 1
cost 1000;
mode point-to-point;
}
interface xe-0/1/2.0 { -----------------------To Core 2
cost 1000;
mode point-to-point;
}
interface Level-3-R1-Vlan {
edge;
}
interface Wireless-Port {
edge;
}
msti 1 {
bridge-priority 4k;
vlan [ 123 400 ];
}
msti 2 {
bridge-priority 8k;
vlan 74;
}
bpdu-block-on-edge;
Result on Access Switch
{master:0}[edit protocols mstp]
root@DBKL-3-R1-FSW# run show spanning-tree interface
Spanning tree interface parameters for instance 0
Interface Port ID Designated Designated Port State Role
port ID bridge ID Cost
xe-0/1/0.0 128:561 128:44 4096.3c61044c8bd1 1000 FWD ROOT
xe-0/1/2.0 128:563 128:44 8192.3c61044b53d1 1000 BLK ALT
Spanning tree interface parameters for instance 1
Interface Port ID Designated Designated Port State Role
port ID bridge ID Cost
xe-0/1/0.0 128:561 128:561 4097.3c8ab01ee2c1 2000 FWD MSTR
xe-0/1/2.0 128:563 128:563 4097.3c8ab01ee2c1 2000 BLK ALT
Spanning tree interface parameters for instance 2
Interface Port ID Designated Designated Port State Role
port ID bridge ID Cost
xe-0/1/0.0 128:561 128:561 8194.3c8ab01ee2c1 2000 FWD MSTR
xe-0/1/2.0 128:563 128:563 8194.3c8ab01ee2c1 2000 BLK ALT supposedly this state cannot BLK right ?
root@DBKL-L1-CSW01# run show configuration protocols mstp
configuration-name DBKL;
revision-level 1;
bridge-priority 4k;
interface xe-1/0/0 {
mode point-to-point;
}
interface xe-1/0/1 {
mode point-to-point;
}
interface xe-1/0/2 {
mode point-to-point;
}
interface xe-1/0/3 {
cost 1000;
mode point-to-point;
}
interface xe-1/0/4 {
mode point-to-point;
}
interface xe-1/0/5 {
mode point-to-point;
}
interface xe-1/0/6 {
mode point-to-point;
}
interface xe-1/0/7 {
mode point-to-point;
}
interface xe-1/1/0 {
mode point-to-point;
}
interface xe-1/1/1 {
mode point-to-point;
}
interface xe-1/1/2 {
mode point-to-point;
}
interface xe-1/1/3 {
mode point-to-point;
}
interface xe-1/1/4 {
mode point-to-point;
}
interface xe-1/1/5 {
mode point-to-point;
}
interface xe-1/1/6 {
mode point-to-point;
}
interface xe-1/1/7 {
mode point-to-point;
}
interface xe-1/2/0 {
mode point-to-point;
}
interface xe-1/2/1 {
mode point-to-point;
}
interface xe-1/2/2 {
mode point-to-point;
}
interface xe-1/2/3 {
mode point-to-point;
}
interface xe-1/2/4 {
mode point-to-point;
}
interface xe-1/2/5 {
mode point-to-point;
}
interface xe-1/2/6 {
mode point-to-point;
}
interface xe-1/2/7 {
mode point-to-point;
}
interface xe-1/3/0 {
mode point-to-point;
}
interface xe-1/3/1 {
mode point-to-point;
}
interface xe-1/3/2 {
mode point-to-point;
}
interface xe-1/3/3 {
mode point-to-point;
}
interface xe-1/3/4 {
mode point-to-point;
}
interface xe-1/3/5 {
mode point-to-point;
}
interface xe-1/3/6 {
mode point-to-point;
}
interface xe-2/0/1 {
mode point-to-point;
}
interface ae0 {
cost 1000;
mode point-to-point;
}
msti 1 {
bridge-priority 4k;
vlan [ 61 62 63 64 65 66 67 68 80 81 83 91 100 101 102 103 104 123 142 202 254 401 402 999 400 ];
}
msti 2 {
bridge-priority 8k;
vlan [ 70 71 72 73 74 75 76 77 78 79 ];
}