[c-nsp] Bug with IOS-XR and SPAN ports?

[Hank Nussbacher]

We upgraded our AS9010 this morning from 5.1.3 to 5.3.3 and encountered
an issue with SPAN ports.

Our SPAN port config looks like this:
monitor-session No1 ethernet
 destination interface TenGigE0/1/1/4
!
monitor-session No2 ethernet
 destination interface TenGigE0/1/1/5
!
interface GigabitEthernet0/1/0/10
 monitor-session No1 ethernet
!
interface TenGigE0/0/1/2
 monitor-session No2 ethernet
!
interface TenGigE0/1/1/7
 monitor-session No1 ethernet
!
interface TenGigE0/1/1/7.100
 monitor-session No1 ethernet
!
interface TenGigE0/1/1/7.333
 monitor-session No1 ethernet
!
interface TenGigE0/1/1/7.667
 monitor-session No1 ethernet

On IOS-XR 5.1.3 - no problem with the above config.  On IOS-XR 5.3.3 we
found that when the destination SPAN port gets overloaded, in addition
to dropping the pkt destined to the destination port (no big deal),
IOS-XR also silently drops the pkt from the port that was being SPANed
(yes, a big deal).  Has anyone encountered this, or has a workaround or
a Cisco bugid?

Thanks,
Hank