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Webcast-Catalyst9k
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3845 cisco router max bwandwidth on the WAN?

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

1 REPLY
Cisco Employee

Re: 3845 cisco router max bwandwidth on the WAN?

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?

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