issue regarding RSPAN

[Yu3]

so i have RSPAN configured across a few switches 

is it possible for me to  use RSPAN on a local switch as a destination to then use it again as a source to send to the collector interface

this is my config on my BB switch to which my collector is connected 

monitor session 1 destination interface Gi1/0/34
monitor session 1 source remote vlan 999
monitor session 2 source interface Po1 , Po2 , Po3 , Po4
monitor session 2 destination remote vlan 999
monitor session 3 source vlan 98
monitor session 3 destination remote vlan 999

at the moment it seem like only session 1 is working   . but only for  remote switches data

local data from session 2\3 does not seem to be inserted into to rspan vlan as i configured 

999 is the rspan vlan which other switches use to send towards the BB switch 

i have tried to also use rspan vlan 999 on the locally on the BB in order to forward it to the destination interface since i cannot mix rspan and local vlans (interfaces) in the same session 

any idea why this does not work ? or will you configure it ? 

[balaji.bandi]

personally, I don't think that will work.

why not create another session using a different VLAN .

not sure what switch model and ios code running on your environment - check some limitations:

https://community.cisco.com/t5/networking-knowledge-base/the-limitations-of-span-and-rspan-on-the-cisco-catalyst-2950/ta-p/3124141

[Yu3]

diffrent vlan for what? 

what I'm trying to achieve here is to get vlan 999 ( my rspan vlan) + the local switch traffic to get forward to my collector on Gi1/0/34

how will you configre it? 

[balaji.bandi]

All this config only 1 switch ?

monitor session 2 source interface Po1 , Po2 , Po3 , Po4  --> make sure that VLAN not part of this (when you using destination example interface  1/0/34

what I'm trying to achieve here is to get vlan 999 ( my rspan vlan) + the local switch traffic to get forward to my collector on Gi1/0/34

then you need to do below :

monitor session 2 source interface Po1 , Po2 , Po3 , Po4
monitor session 2 destination interface Gi1/0/34
monitor session 3 source vlan 98
monitor session 3 destination interface Gi1/0/34

[Yu3]

You cannot have two SPAN sessions that use the same destination port. The destination port cannot be a source port; a source port cannot be a destination port.

and also you cannot use non rspan vlan at session 1  as source 

[balaji.bandi]

All this config only 1 switch ? 

what is the device model and IOS code running ?

if this is the limit as you see in the platform config guide, then the only option you have is to use a different port - since we know that is a limitation.

again I would like to see the IOS and device information to suggest is this limitation.

refer to below guide how RSPAN traffic sends to other switches:

https://community.cisco.com/t5/networking-knowledge-base/understanding-span-rspan-and-erspan/ta-p/3144951

[MHM Cisco World]

ENCOR 350-401 Topic 4.4 - SPAN, RSPAN & ERSPAN - YouTube

this example what you need I think.