Wired Intelligent Edge

Hi 

Description on problem/question

Servers and other  davices  that are connected to the hp3800 stack member or switch ports . Servers and devices (including switches) are configured for ports to work on the truncated, trunk, LACP, tagged vlan 802.1q.

 An example of a switch stack configuration:

 trunk 1/21,2/21 trk21 lacp

trunk 1/22,2/22 trk22 lacp

vlan 222

   name "VLAN222"

   tagged trk21, trk22

   no ip address

 

Is it possible safely connect these servers and devices using single hp 3800 using only one hp 3800 switch port per server/device with out changing server and devices configuarations.

For exmple confuguring the singe hp 3800 switch as following example:

 

trunk  1/20 lacp

vlan 222

   name "VLAN222"

   tagged trk21

   no ip address

 

or

vlan 222

   name "VLAN222"

   tagged  1/20

   no ip address

 

 

Do you want to use only one link of the two that are - currently - part/member of the same aggregated group (trk21 or trk22 for the sake of your example)?

Totally possible...just disconnect the cable you don't want...but this is a "degraded" aggregated group LACP which has temporarily/permanently lost one of its partecipating link.

If you want to move Server from being dual homed to both HP 3800 switches to being single homed to just one HP 3800 switch you should reconfigure switch side (destroying involved LACP aggregated ports) and server side (destroying bonding/teaming) the type of logical links you currently use form LACP logical link to common single physical link freeing one port per aggregated group.

This has nothing to do with usage of command "trunk" (that's Cisco remembrance to say the link can carry multiple VLANs).

In HP ProCurve jargon an access port is untagged of one VLAN, you can then simply tagging other VLANs on the same access port in order to carry them along with untagged (PVID) native VLAN, if necessary. 

I try to explain question

At the moment these server and divices are connected to HP two switch satck with two cables , each server/device is connected one switch. (LACP/tagged vlan 802.1q)  My  are plan is to use temporarly  this one hp 3800 switch with out changing  server and devives configurtions.  Bacasue the in this hp switch that we are planning to use temporarly 24 ports.  Idea is connect only on cable to to this switch with out changing server and devices configurations. After we to return to two HP switch stack configuration and reconnect these server devices to HP switch stack with two cables , where each server/device is connected one switch .  

My quistion what wil be valid configurion for this temporary on switch port configuratin  tagged vlan 802.1q to connect server and other devices with out chenging thier configurations

 

More additional information 

We have two hp switheses in stack configurtion and server and devices connected using (link aggregation) LACP/tagged vlan 802.1q.  

One hp stand alone switch that we want use temporarly then the hp stacked switch is not available.   Idea is connect each server and device with one cable to this standalone switch without changing server and devices configurtion.  

If we configuere these standalone  switch  each port to tagged vlan need fore each server and device is this enough.

 

I'm really sorry...I barely understood what you tried to explain and what you're trying to achieve.

I can only add some extra bits to what I already wrote above to better clarify the scenario I understood you're dealing with: if you have a dual homed Server - so a Server which is concurrently connnected with two of its NIC ports in a bond/team (LACP) to both HP 3800 stacked Switches (let me call them respectively HP 3800-1 and HP 3800-2 for the sake of clarity) - then you can disconnect one of the two links between it and one switch part of the stack (say the one from Server to HP 3800-1 or the one from Server to HP 3800-2, it doesn't really matter which one you disconnect) without causing too much traffic disruption (traffic on the disconnected link will lose some packets but new packets sent will be all necessarily and automatically redirected to the remaining link still in Up state). Clearly this should be temporary (example: you need to do maintenance on one HP 3800).

Said so...following the above scenario, you can also keep all links Up and just shutdown (or remove) the HP 3800-1 or the HP 3800-2...doing so you basically will achive the same result...from the Server point of view.

The most important thing to remember is that if you both peers' ends use LACP for their aggregated ports you must continue to use LACP on both sides...you can't - not even temporarily - have one side with ports not part of a LACP. In other terms: if you do use LACP, you must do it on both side and involved ports must be part of the same physical or logical (in case of Backplane/Frontplane stacking) Switch peer.

 

I will try to explain further what aim and quistion is.

At the moment thes dual homed server and other devices are in bond/team LACP configurion and using tagged vlans. 802.1q . These server and other devices and connected to hp 3800  stacked switces (two switces) which  ports configured accordingly to team LACP and tagged vlans 802.1q.

I want replace temporaly this  hp 3800 stcked siwtch with  only one hp 3800 swich .  Then this temparly used one hp switch is working the. all  hp stacked swithes are all  power switced and the are not working.

These dual homed server and other devices  will be connected to this tempoarly used  HP 3800 switch with only one  cable (only with ih one connection) . Idea is not cahenge these server and other divces configurtion when the temparly used  switch is working.   After short period we  replace this one switch with  HP 3800 stack by  connacting dual homed server and othaer devices  as the was before..

My question is in waht configurtion must be  used in temporaly used one hp switch side in case then do not want change server and pther devices bond/team confugurtions,  Is there enough configure  ports with necceasry  tagged vlans on must i configure on port team and tagged vlans to this team