Port Channel Downtime/Convergence time when adding interfaces

[abland]

I am looking to add a 3rd and maybe a 4th physical port to an existing port channel as we are running out of capacity, at peak we are pushing around 1.3Gb over the 2Gb channel and we are expanding services out of this location. My question is this, what will the downtime and convergence time be on the port channel when i add in the extra interfaces. Will i drop packets, will my customers notice any service disruption ?

Currently configured as follows:

interface Port-channel2
 description DN Agg Switch 2
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan add <very large vlan list>
 switchport mode trunk
 mtu 9216
 mls qos trust dscp
 spanning-tree bpdufilter enable
.
.
interface GigabitEthernet1/47
 description Po2 AGG#1
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan add <very large vlan list>
 switchport mode trunk
 mtu 9216
 mls qos trust dscp
 no cdp enable
 channel-group 2 mode on
.
.
interface GigabitEthernet2/47
 description Po2 AGG#2
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan add <very large vlan list>
 switchport mode trunk
 mtu 9216
 mls qos trust dscp
 no cdp enable
 channel-group 2 mode on

Thank you

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

I wouldn't expect any service impact when adding links to the bundle.