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Spanning VLAN's across two HP switches
Posted on 2009-03-30
I have an HP core switch that I am hanging multiple edge switches from. All of the connected ports on the core switch and edge switch's that are connected are in VLAN 12. I also have seperate VLANs on each switch that are working properly. I am able to communicate from switch to switch across VLANS. I currently do not have any VLAN's that span across muliple edge switches. I had to do this the other day with VLAN 48. I tagged port 17 on switch A with VLAN 48 and it took but I can not talk to machines on VLAN 48 on switch B. Am I missing a command on the end switches or the core switch?
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6 Comments
So packets from switch A goes first to the core switch and then to switch B?
You need to configure trunk ports between the core switch and the edge switches. Otherwise packets tagged with anything else than VLAN12 will be discarded when going to the core switch.
You need to configure trunk ports between the core switch and the edge switches. Otherwise packets tagged with anything else than VLAN12 will be discarded when going to the core switch.
Below are segments from the config on the core. I picked this up from another person so I was not the original config writer. Is it possible Trk5 is only on switch 5? The port that I am trying to configure is on switch 3 in my environment but I don't see anywhere that switch 3 is defined in hte config seperatly.
vlan 48
name "CUST_SERV"
ip helper-address 10.25.2.101
ip helper-address 10.25.2.102
ip address 10.48.0.1 255.255.0.0
tagged Trk5
exit
spanning-tree Trk1 priority 4
spanning-tree Trk2 priority 4
spanning-tree Trk3 priority 4
spanning-tree Trk4 priority 4
spanning-tree Trk5 priority 4
spanning-tree Trk6 priority 4
spanning-tree Trk7 priority 4
spanning-tree Trk8 priority 4
spanning-tree Trk9 priority 4
spanning-tree Trk10 priority 4
vlan 48
name "CUST_SERV"
ip helper-address 10.25.2.101
ip helper-address 10.25.2.102
ip address 10.48.0.1 255.255.0.0
tagged Trk5
exit
spanning-tree Trk1 priority 4
spanning-tree Trk2 priority 4
spanning-tree Trk3 priority 4
spanning-tree Trk4 priority 4
spanning-tree Trk5 priority 4
spanning-tree Trk6 priority 4
spanning-tree Trk7 priority 4
spanning-tree Trk8 priority 4
spanning-tree Trk9 priority 4
spanning-tree Trk10 priority 4
Asume these links: sw A/port17---coreSw/portA1 and
coreSw/portA2---sw B/port26
(that is no link aggregation, in procurve lingo known as trunks)
Asume you want vlan 1, vlan 12 and vlan 48 on all 3 sw's
sw A:
config
vlan 1
untag 1
tag 17
exit
vlan 12
untag 2
tag 17
exit
vlan 48
untag 3
tag 17
exit
......
sw core
config
vlan 1
tag A1,A2
exit
vlan 12
untag A3
tag A1,A2
exit
vlan 48
untag A4
tag A1,A2
exit
......
sw B:
config
vlan 1
untag 1
tag 26
exit
vlan 12
untag 2
tag 26
exit
vlan 48
untag 3
tag 26
exit
the untagged ports are accesports
HTH
coreSw/portA2---sw B/port26
(that is no link aggregation, in procurve lingo known as trunks)
Asume you want vlan 1, vlan 12 and vlan 48 on all 3 sw's
sw A:
config
vlan 1
untag 1
tag 17
exit
vlan 12
untag 2
tag 17
exit
vlan 48
untag 3
tag 17
exit
......
sw core
config
vlan 1
tag A1,A2
exit
vlan 12
untag A3
tag A1,A2
exit
vlan 48
untag A4
tag A1,A2
exit
......
sw B:
config
vlan 1
untag 1
tag 26
exit
vlan 12
untag 2
tag 26
exit
vlan 48
untag 3
tag 26
exit
the untagged ports are accesports
HTH
Active 3 days ago
In HP world tagged is 802.1q, Cisco world trunk is 802.1q.
A trunked port on HP is link aggregation. The core switch port and the edge switch port would need to be tagged for each VLAN that needs access.
Quote from above:
"port 17 on switch A with VLAN 48 and it took but I can not talk to machines on VLAN 48 on switch B"
port 17 Switch A----->Core------->Switch B
Each switch port connecting the 3 will have to be tagged if multiple vlans are being connected. If only VLAN 48 is applied to the switches, the ports would not need to be tagged.
A trunked port on HP is link aggregation. The core switch port and the edge switch port would need to be tagged for each VLAN that needs access.
Quote from above:
"port 17 on switch A with VLAN 48 and it took but I can not talk to machines on VLAN 48 on switch B"
port 17 Switch A----->Core------->Switch B
Each switch port connecting the 3 will have to be tagged if multiple vlans are being connected. If only VLAN 48 is applied to the switches, the ports would not need to be tagged.
Hi
Please see the below diagrame.Hp severs are connected with Two hp procurve swtch.Each HP switch are connected seperately with Distswitch.Between distribution switch L3 portchannel is configured.For beter redundency purpose of servers we are using the below toplogy.
Cisco DistributionS1 -Portchannel (L3)- Cisco DistributionS1
| |
HP Procurve switch1 HP Procurve switch2
| Active | standby
Servers(with two Nic card/Bonding)......As active/Standby
All servers are pingable from DistributionS2 when its connected port to HP Procurve switch2 is shut.I supose in thes scenario it is using the path of portchannel connected the Distswitch1.
As soon as i open the connected port to HP Procurve switch2 it stop pinging the servers.Its only pingable from DistributionS1.I am Supposing that in this scenario traffic is not diverted toward the portchannel.Due to in this circumstances other l2 switch in datacentre which are forwarding the traffic via DIStswitch2 are unable to ping the the server.
I wanted that it should ping from every switch at any time.
My question is What i would do so it would ping every time from both Distswitch1 and Distswitch2 ?
Please see the below diagrame.Hp severs are connected with Two hp procurve swtch.Each HP switch are connected seperately with Distswitch.Between distribution switch L3 portchannel is configured.For beter redundency purpose of servers we are using the below toplogy.
Cisco DistributionS1 -Portchannel (L3)- Cisco DistributionS1
| |
HP Procurve switch1 HP Procurve switch2
| Active | standby
Servers(with two Nic card/Bonding)......As active/Standby
All servers are pingable from DistributionS2 when its connected port to HP Procurve switch2 is shut.I supose in thes scenario it is using the path of portchannel connected the Distswitch1.
As soon as i open the connected port to HP Procurve switch2 it stop pinging the servers.Its only pingable from DistributionS1.I am Supposing that in this scenario traffic is not diverted toward the portchannel.Due to in this circumstances other l2 switch in datacentre which are forwarding the traffic via DIStswitch2 are unable to ping the the server.
I wanted that it should ping from every switch at any time.
My question is What i would do so it would ping every time from both Distswitch1 and Distswitch2 ?
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