Over the past few weeks I’ve been working with HP switches so I decided I would extend my series on LACP trunking to include HP switches. In my lab I used HP 2810 switches which are dated but the concepts are the same for any of the newer HPE switch equipment. I cabled the HP switches to a pair of Cisco 2950s, you may noticed that I’ve changed some of the ports I’m using from the previous lab examples (check the diagram).
I noticed while working on setting up this lab that the MST digest between the Cisco and HP switches didn’t match. After some quick research it appears that the Cisco 2950s I have in the lab operate with a pre standard MST operation. Other Cisco switches identify them as such and are interoperable but you may have issues with third-party devices that are expecting the 802.1s standard. You can see both digests from the Cisco 3750 below and they match both the Cisco 2950 and the HP 2810 switches.
C3750-SW1#show spanning-tree mst configuration digest Name [AcmeNetworks] Revision 1 Instances configured 3 Digest 0x6DA4B50C4FD587757EEF0356753605E1 Pre-std Digest 0x421D7D23BF9562A0C35E46CA1BE8A75C
Example Topology
You’ll notice the HP switches at the bottom of the diagram. It was pretty straight forward but here’s what I needed to do.
Cisco Catalyst 2950 Switch 1 & 2
First we needed to configure the ports on the Cisco 2950s that would be connected to the HP switches. I used Port Channel 3 for this and enabled LACP;
interface fas0/15 switchport mode trunk channel-protocol lacp channel-group 3 mode active interface fas0/16 switchport mode trunk channel-protocol lacp channel-group 3 mode active
HP 2810 Switch 1 & 2
Now we need to configure the HP switches, VLANs, IP addressing, ports, trunking, MST, etc;
vlan 100 name "192-168-100-0/24" vlan 200 name "192-168-200-0/24" vlan 100 ip address 192.168.100.70 255.255.255.0 exit spanning-tree spanning-tree config-name "AcmeNetworks" spanning-tree config-revision 1 spanning-tree instance 1 vlan 100 spanning-tree instance 2 vlan 200 trunk 1,13 trk1 lacp trunk 23,24 trk2 lacp vlan 100 tagged trk1 vlan 200 tagged trk1 vlan 100 tagged trk2 vlan 200 tagged trk2
That’s all well and good but I’m sure you want to see the output… is it working as expected? Well let’s check it out.
Cisco Catalyst 2950 Switch 1
We can see from the data below that LACP has established to the HP switch and Spanning Tree is working as expected;
C2950-SW1#show lacp neighbor
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode
Channel group 1 neighbors
Partner's information:
LACP port Oper Port Port
Port Flags Priority Dev ID Age Key Number State
Fa0/1 SA 32768 0064.40cf.4d80 24s 0x3 0x102 0x3D
Fa0/2 SA 32768 0064.40cf.4d80 17s 0x3 0x103 0x3D
Channel group 2 neighbors
Partner's information:
LACP port Oper Port Port
Port Flags Priority Dev ID Age Key Number State
Fa0/31 SA 32768 0018.ba8e.4a40 22s 0x2 0x1F 0x3D
Fa0/33 SA 32768 0018.ba8e.4a40 3s 0x2 0x21 0x3D
Channel group 3 neighbors
Partner's information:
LACP port Oper Port Port
Port Flags Priority Dev ID Age Key Number State
Fa0/15 SA 0 0026.f1df.f400 21s 0x32 0x18 0x3D
Fa0/16 SA 0 0026.f1df.f400 21s 0x32 0x17 0x3D
C2950-SW1#show spanning-tree
MST00
Spanning tree enabled protocol mstp
Root ID Priority 16384
Address 3475.c732.a400
Cost 0
Port 65 (Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
Address 0019.2faa.49c0
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 100000 128.65 P2p
Po2 Altn BLK 100000 128.66 P2p
Po3 Desg FWD 100000 128.67 P2p Bound(RSTP)
MST01
Spanning tree enabled protocol mstp
Root ID Priority 16385
Address 54e0.322a.d441
Cost 120000
Port 65 (Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0019.2faa.49c0
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 100000 128.65 P2p
Po2 Altn BLK 100000 128.66 P2p
Po3 Boun FWD 100000 128.67 P2p Bound(RSTP)
MST02
Spanning tree enabled protocol mstp
Root ID Priority 16386
Address 0064.40cf.4d80
Cost 100000
Port 65 (Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32770 (priority 32768 sys-id-ext 2)
Address 0019.2faa.49c0
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 100000 128.65 P2p
Po2 Altn BLK 100000 128.66 P2p
Po3 Boun FWD 100000 128.67 P2p Bound(RSTP)
C2950-SW1#show spanning-tree mst configuration digest
Name [AcmeNetworks]
Revision 1
Instance Vlans mapped
-------- ---------------------------------------------------------------------
0 1-99,101-199,201-4094
1 100
2 200
-------------------------------------------------------------------------------
Digest 421D7D23BF9562A0C35E46CA1BE8A75C
Cisco Catalyst 2950 Switch 2
We can see from the data below that LACP has established to the HP switch and Spanning Tree is working as expected;
C2950-SW2#show lacp neighbor
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode
Channel group 1 neighbors
Partner's information:
LACP port Oper Port Port
Port Flags Priority Dev ID Age Key Number State
Fa0/47 SA 32768 0064.40cf.4d80 2s 0x4 0x130 0x3D
Fa0/48 SA 32768 0064.40cf.4d80 25s 0x4 0x131 0x3D
Channel group 2 neighbors
Partner's information:
LACP port Oper Port Port
Port Flags Priority Dev ID Age Key Number State
Fa0/31 SA 32768 0019.2faa.49c0 27s 0x2 0x1F 0x3D
Fa0/33 SA 32768 0019.2faa.49c0 19s 0x2 0x21 0x3D
Channel group 3 neighbors
Partner's information:
LACP port Oper Port Port
Port Flags Priority Dev ID Age Key Number State
Fa0/15 SA 0 0026.f1e1.41a0 29s 0x32 0x17 0x3D
Fa0/16 SA 0 0026.f1e1.41a0 0s 0x32 0x18 0x3D
C2950-SW2#show spanning-tree
MST00
Spanning tree enabled protocol mstp
Root ID Priority 16384
Address 3475.c732.a400
Cost 0
Port 65 (Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
Address 0018.ba8e.4a40
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 100000 128.65 P2p
Po2 Desg FWD 100000 128.66 P2p
Po3 Desg FWD 100000 128.67 P2p Bound(RSTP)
MST01
Spanning tree enabled protocol mstp
Root ID Priority 16385
Address 54e0.322a.d441
Cost 120000
Port 65 (Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0018.ba8e.4a40
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 100000 128.65 P2p
Po2 Desg FWD 100000 128.66 P2p
Po3 Boun FWD 100000 128.67 P2p Bound(RSTP)
MST02
Spanning tree enabled protocol mstp
Root ID Priority 16386
Address 0064.40cf.4d80
Cost 100000
Port 65 (Port-channel1)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32770 (priority 32768 sys-id-ext 2)
Address 0018.ba8e.4a40
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 100000 128.65 P2p
Po2 Desg FWD 100000 128.66 P2p
Po3 Boun FWD 100000 128.67 P2p Bound(RSTP)
C2950-SW2# show spanning-tree mst configuration digest
Name [AcmeNetworks]
Revision 1
Instance Vlans mapped
-------- ---------------------------------------------------------------------
0 1-99,101-199,201-4094
1 100
2 200
-------------------------------------------------------------------------------
Digest 421D7D23BF9562A0C35E46CA1BE8A75C
HP 2810 Switch 1
HP-SW1# show lacp
LACP
PORT LACP TRUNK PORT LACP LACP
NUMB ENABLED GROUP STATUS PARTNER STATUS
---- ------- ------- ------- ------- -------
1 Active Trk1 Up Yes Success
13 Active Trk1 Up Yes Success
23 Active Trk2 Up Yes Success
24 Active Trk2 Up Yes Success
HP-SW1# show cdp neighbors
CDP neighbors information
Port Device ID | Platform Capability
---- ----------------------------- + ---------------------------- -----------
1 00 26 f1 e1 41 a0 | ProCurve J9021A Switch 28... S
13 00 26 f1 e1 41 a0 | ProCurve J9021A Switch 28... S
23 C2950-SW1 | Cisco Internetwork Operat... S
24 C2950-SW1 | Cisco Internetwork Operat... S
HP-SW1# show spanning-tree
Multiple Spanning Tree (MST) Information
STP Enabled : Yes
Force Version : MSTP-operation
IST Mapped VLANs : 1
Switch MAC Address : 0026f1-dff400
Switch Priority : 32768
Max Age : 20
Max Hops : 20
Forward Delay : 15
Topology Change Count : 332
Time Since Last Change : 53 mins
CST Root MAC Address : 3475c7-32a400
CST Root Priority : 16384
CST Root Path Cost : 200000
CST Root Port : Trk2
IST Regional Root MAC Address : 0026f1-dff400
IST Regional Root Priority : 32768
IST Regional Root Path Cost : 0
IST Remaining Hops : 20
Root Guard Ports :
TCN Guard Ports :
Protected Ports :
Filtered Ports :
| Prio | Designated Hello
Port Type | Cost rity State | Bridge Time PtP Edge
----- --------- + --------- ----- ---------- + ------------- ----- --- ----
2 100/1000T | Auto 128 Disabled |
3 100/1000T | Auto 128 Disabled |
4 100/1000T | Auto 128 Disabled |
5 100/1000T | Auto 128 Disabled |
6 100/1000T | Auto 128 Disabled |
7 100/1000T | Auto 128 Disabled |
8 100/1000T | Auto 128 Disabled |
9 100/1000T | Auto 128 Disabled |
10 100/1000T | Auto 128 Disabled |
11 100/1000T | Auto 128 Disabled |
12 100/1000T | Auto 128 Disabled |
14 100/1000T | Auto 128 Disabled |
15 100/1000T | Auto 128 Disabled |
16 100/1000T | Auto 128 Disabled |
17 100/1000T | Auto 128 Disabled |
18 100/1000T | Auto 128 Disabled |
19 100/1000T | Auto 128 Disabled |
20 100/1000T | Auto 128 Disabled |
21 100/1000T | Auto 128 Disabled |
22 100/1000T | Auto 128 Disabled |
Trk1 | 20000 64 Forwarding | 0026f1-dff400 2 Yes No
Trk2 | 200000 64 Forwarding | 00192f-aa49c0 2 Yes No
HP-SW1# show spanning-tree instance 1
MST Instance Information
Instance ID : 1
Mapped VLANs : 100
Switch Priority : 32768
Topology Change Count : 39
Time Since Last Change : 53 mins
Regional Root MAC Address : 0026f1-dff400
Regional Root Priority : 32768
Regional Root Path Cost : 0
Regional Root Port : This switch is root
Remaining Hops : 20
Designated
Port Type Cost Priority Role State Bridge
----- --------- --------- -------- ---------- ---------- -------------
2 100/1000T Auto 128 Disabled Disabled
3 100/1000T Auto 128 Disabled Disabled
4 100/1000T Auto 128 Disabled Disabled
5 100/1000T Auto 128 Disabled Disabled
6 100/1000T Auto 128 Disabled Disabled
7 100/1000T Auto 128 Disabled Disabled
8 100/1000T Auto 128 Disabled Disabled
9 100/1000T Auto 128 Disabled Disabled
10 100/1000T Auto 128 Disabled Disabled
11 100/1000T Auto 128 Disabled Disabled
12 100/1000T Auto 128 Disabled Disabled
14 100/1000T Auto 128 Disabled Disabled
15 100/1000T Auto 128 Disabled Disabled
16 100/1000T Auto 128 Disabled Disabled
17 100/1000T Auto 128 Disabled Disabled
18 100/1000T Auto 128 Disabled Disabled
19 100/1000T Auto 128 Disabled Disabled
20 100/1000T Auto 128 Disabled Disabled
21 100/1000T Auto 128 Disabled Disabled
22 100/1000T Auto 128 Disabled Disabled
Trk1 20000 128 Designated Forwarding 0026f1-dff400
Trk2 200000 128 Master Forwarding 0026f1-dff400
HP-SW1# show spanning-tree instance 2
MST Instance Information
Instance ID : 2
Mapped VLANs : 200
Switch Priority : 32768
Topology Change Count : 38
Time Since Last Change : 53 mins
Regional Root MAC Address : 0026f1-dff400
Regional Root Priority : 32768
Regional Root Path Cost : 0
Regional Root Port : This switch is root
Remaining Hops : 20
Designated
Port Type Cost Priority Role State Bridge
----- --------- --------- -------- ---------- ---------- -------------
2 100/1000T Auto 128 Disabled Disabled
3 100/1000T Auto 128 Disabled Disabled
4 100/1000T Auto 128 Disabled Disabled
5 100/1000T Auto 128 Disabled Disabled
6 100/1000T Auto 128 Disabled Disabled
7 100/1000T Auto 128 Disabled Disabled
8 100/1000T Auto 128 Disabled Disabled
9 100/1000T Auto 128 Disabled Disabled
10 100/1000T Auto 128 Disabled Disabled
11 100/1000T Auto 128 Disabled Disabled
12 100/1000T Auto 128 Disabled Disabled
14 100/1000T Auto 128 Disabled Disabled
15 100/1000T Auto 128 Disabled Disabled
16 100/1000T Auto 128 Disabled Disabled
17 100/1000T Auto 128 Disabled Disabled
18 100/1000T Auto 128 Disabled Disabled
19 100/1000T Auto 128 Disabled Disabled
20 100/1000T Auto 128 Disabled Disabled
21 100/1000T Auto 128 Disabled Disabled
22 100/1000T Auto 128 Disabled Disabled
Trk1 20000 128 Designated Forwarding 0026f1-dff400
Trk2 200000 128 Master Forwarding 0026f1-dff400
HP-SW1# show spanning-tree mst-config
MST Configuration Identifier Information
MST Configuration Name : AcmeNetworks
MST Configuration Revision : 1
MST Configuration Digest : 0x6DA4B50C4FD587757EEF0356753605E1
IST Mapped VLANs : 1
Instance ID Mapped VLANs
----------- ---------------------------------------------------------
1 100
2 200
HP 2810 Switch 2
HP-SW2# show lacp
LACP
PORT LACP TRUNK PORT LACP LACP
NUMB ENABLED GROUP STATUS PARTNER STATUS
---- ------- ------- ------- ------- -------
1 Active Trk1 Up Yes Success
13 Active Trk1 Up Yes Success
23 Active Trk2 Up Yes Success
24 Active Trk2 Up Yes Success
HP-SW2# show cdp neighbors
CDP neighbors information
Port Device ID | Platform Capability
---- ----------------------------- + ---------------------------- -----------
1 00 26 f1 df f4 00 | ProCurve J9021A Switch 28... S
13 00 26 f1 df f4 00 | ProCurve J9021A Switch 28... S
23 C2950-SW2 | Cisco Internetwork Operat... S
24 C2950-SW2 | Cisco Internetwork Operat... S
HP-SW2# show spanning-tree
Multiple Spanning Tree (MST) Information
STP Enabled : Yes
Force Version : MSTP-operation
IST Mapped VLANs : 1
Switch MAC Address : 0026f1-e141a0
Switch Priority : 32768
Max Age : 20
Max Hops : 20
Forward Delay : 15
Topology Change Count : 65
Time Since Last Change : 66 mins
CST Root MAC Address : 3475c7-32a400
CST Root Priority : 16384
CST Root Path Cost : 200000
CST Root Port : Trk1
IST Regional Root MAC Address : 0026f1-dff400
IST Regional Root Priority : 32768
IST Regional Root Path Cost : 20000
IST Remaining Hops : 19
Root Guard Ports :
TCN Guard Ports :
Protected Ports :
Filtered Ports :
| Prio | Designated Hello
Port Type | Cost rity State | Bridge Time PtP Edge
----- --------- + --------- ----- ---------- + ------------- ----- --- ----
2 100/1000T | Auto 128 Disabled |
3 100/1000T | Auto 128 Disabled |
4 100/1000T | Auto 128 Disabled |
5 100/1000T | Auto 128 Disabled |
6 100/1000T | Auto 128 Disabled |
7 100/1000T | Auto 128 Disabled |
8 100/1000T | Auto 128 Disabled |
9 100/1000T | Auto 128 Disabled |
10 100/1000T | Auto 128 Disabled |
11 100/1000T | Auto 128 Disabled |
12 100/1000T | Auto 128 Disabled |
14 100/1000T | Auto 128 Disabled |
15 100/1000T | Auto 128 Disabled |
16 100/1000T | Auto 128 Disabled |
17 100/1000T | Auto 128 Disabled |
18 100/1000T | Auto 128 Disabled |
19 100/1000T | Auto 128 Disabled |
20 100/1000T | Auto 128 Disabled |
21 100/1000T | Auto 128 Disabled |
22 100/1000T | Auto 128 Disabled |
Trk1 | 20000 64 Forwarding | 0026f1-dff400 2 Yes No
Trk2 | 200000 64 Blocking | 0018ba-8e4a40 2 Yes No
HP-SW2# show spanning-tree instance 1
MST Instance Information
Instance ID : 1
Mapped VLANs : 100
Switch Priority : 32768
Topology Change Count : 11
Time Since Last Change : 66 mins
Regional Root MAC Address : 0026f1-dff400
Regional Root Priority : 32768
Regional Root Path Cost : 20000
Regional Root Port : Trk1
Remaining Hops : 19
Designated
Port Type Cost Priority Role State Bridge
----- --------- --------- -------- ---------- ---------- -------------
2 100/1000T Auto 128 Disabled Disabled
3 100/1000T Auto 128 Disabled Disabled
4 100/1000T Auto 128 Disabled Disabled
5 100/1000T Auto 128 Disabled Disabled
6 100/1000T Auto 128 Disabled Disabled
7 100/1000T Auto 128 Disabled Disabled
8 100/1000T Auto 128 Disabled Disabled
9 100/1000T Auto 128 Disabled Disabled
10 100/1000T Auto 128 Disabled Disabled
11 100/1000T Auto 128 Disabled Disabled
12 100/1000T Auto 128 Disabled Disabled
14 100/1000T Auto 128 Disabled Disabled
15 100/1000T Auto 128 Disabled Disabled
16 100/1000T Auto 128 Disabled Disabled
17 100/1000T Auto 128 Disabled Disabled
18 100/1000T Auto 128 Disabled Disabled
19 100/1000T Auto 128 Disabled Disabled
20 100/1000T Auto 128 Disabled Disabled
21 100/1000T Auto 128 Disabled Disabled
22 100/1000T Auto 128 Disabled Disabled
Trk1 20000 128 Root Forwarding 0026f1-dff400
Trk2 200000 128 Alternate Blocking 0026f1-e141a0
HP-SW2# show spanning-tree instance 2
MST Instance Information
Instance ID : 2
Mapped VLANs : 200
Switch Priority : 32768
Topology Change Count : 10
Time Since Last Change : 66 mins
Regional Root MAC Address : 0026f1-dff400
Regional Root Priority : 32768
Regional Root Path Cost : 20000
Regional Root Port : Trk1
Remaining Hops : 19
Designated
Port Type Cost Priority Role State Bridge
----- --------- --------- -------- ---------- ---------- -------------
2 100/1000T Auto 128 Disabled Disabled
3 100/1000T Auto 128 Disabled Disabled
4 100/1000T Auto 128 Disabled Disabled
5 100/1000T Auto 128 Disabled Disabled
6 100/1000T Auto 128 Disabled Disabled
7 100/1000T Auto 128 Disabled Disabled
8 100/1000T Auto 128 Disabled Disabled
9 100/1000T Auto 128 Disabled Disabled
10 100/1000T Auto 128 Disabled Disabled
11 100/1000T Auto 128 Disabled Disabled
12 100/1000T Auto 128 Disabled Disabled
14 100/1000T Auto 128 Disabled Disabled
15 100/1000T Auto 128 Disabled Disabled
16 100/1000T Auto 128 Disabled Disabled
17 100/1000T Auto 128 Disabled Disabled
18 100/1000T Auto 128 Disabled Disabled
19 100/1000T Auto 128 Disabled Disabled
20 100/1000T Auto 128 Disabled Disabled
21 100/1000T Auto 128 Disabled Disabled
22 100/1000T Auto 128 Disabled Disabled
Trk1 20000 128 Root Forwarding 0026f1-dff400
Trk2 200000 128 Alternate Blocking 0026f1-e141a0
HP-SW2# show spanning-tree mst-config
MST Configuration Identifier Information
MST Configuration Name : AcmeNetworks
MST Configuration Revision : 1
MST Configuration Digest : 0x6DA4B50C4FD587757EEF0356753605E1
IST Mapped VLANs : 1
Instance ID Mapped VLANs
----------- ---------------------------------------------------------
1 100
2 200
Cheers!
