Bandwidth Percent

Hi All

I created the following configuration and expected IOS to warn me that I had
exceeded the reservable bandwidth but it did not warn me:

interface FastEthernet1/0
 bandwidth 128
 no ip address
 duplex auto
 speed auto
 service-policy output CBWFQ

class-map match-all TELNET
 match protocol telnet
class-map match-all HTTP
 match protocol http
class-map match-all FTP
 match protocol ftp
class-map match-all VOICE
 match protocol rtp audio
!
policy-map CBWFQ
 class VOICE
    bandwidth percent 25
 class TELNET
    bandwidth percent 25
 class FTP
    bandwidth percent 25
 class HTTP
    bandwidth percent 10

25% of the interface bandwidth gives 32Kb. Therefore after making 3
reservations of 25% I had already achieved 96Kb.
I have left the max-reserved-bandwidth to default of 75%. therefore I should
not be able to reserve more than 96Kb.
However I was able to reserve an additional 10% for HTTP traffic.

Is it on the administrator to ensure that the bandwidth percent values do
not exceed the max-res bandwidth?
What would happen now in my situation where I have more reservations than
reservable bandwidth?

Service-policy output: CBWFQ

    Class-map: VOICE (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: protocol rtp audio
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 0/0
      bandwidth 25% (32 kbps)

    Class-map: TELNET (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: protocol telnet
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 0/0
      bandwidth 25% (32 kbps)

    Class-map: FTP (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: protocol ftp
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 0/0
      bandwidth 25% (32 kbps)

    Class-map: HTTP (match-all)
      0 packets, 0 bytes
      5 minute offered rate 0 bps, drop rate 0 bps
      Match: protocol http
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 0/0
      bandwidth 10% (12 kbps)

Thanks

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Received on Sun Jun 13 2010 - 11:23:31 ART