3845 cisco router max bwandwidth on the WAN?

melaniemaillet · ‎06-28-2010

Hi There

I got a cisco 3845 and i am just wondering how much the box can run as bandwidth on the Gig link? I have a 100M WES circuit and it seems if I apply a shapping at 100M the point to point connection is loosing packets (not frequently) but still loosing some. Any suggestion? Could it be a bug with WRED tunning?

Note is no QOS the point to point is not loosing any packets..

policy-map CE-LEGACY-WAN-OUT
class VOICE
priority 20000
   police cir 20000000
     conform-action set-dscp-transmit ef
     exceed-action drop
class VIDEO
bandwidth 30000
   police cir 30000000
     conform-action set-dscp-transmit af41
     exceed-action set-dscp-transmit af43
class ADVANCED
bandwidth 10000
random-detect dscp-based
random-detect dscp 18   9     42    10
random-detect dscp 22   1     42    10
   police cir 10000000
     conform-action set-dscp-transmit af21
     exceed-action set-dscp-transmit af23
class CRITICAL
bandwidth 10000
random-detect dscp-based
random-detect dscp 26   9     42    10
random-detect dscp 30   1     42    10
   police cir 10000000
     conform-action set-dscp-transmit af31
     exceed-action set-dscp-transmit af33
class MANAGEMENT
bandwidth 64
set ip dscp cs5
class ROUTING
bandwidth 64
set ip dscp cs6
class class-default
bandwidth 27872
random-detect dscp-based
random-detect dscp 10   24    117   11
set ip dscp af11
policy-map SHAPE-CE-WAN-OUT
class class-default
shape average 100000000 1000000 0
service-policy CE-LEGACY-WAN-OUT

Thanks

Mel

gephelps · ‎07-06-2010

Is the shaping applied inbound or outbound? Is the traffic only lost one one direction?

How are you measuring the loss?

Is QOS dropping the packets? Do you see the interface conters increment when there is traffic loss?