I'm unable to apply the service-policy to the interface with the config below.
majormatic-pta-mount(config-if)#service-policy output CE-OUTPUT Insufficient bandwidth 1024 kbps for the bandwidth guarantee (512)
majormatic-pta-mountgrace-mi-ce#sh controllers Serial0/1/0 Interface Serial0/1/0 Hardware is GT96K DTE V.11 (X.21) TX and RX clocks detected.
interface Serial0/1/0 description Link to xxxx bandwidth 1024 ip address x.x.x.x ip access-group 101 in ip access-group 101 out no ip redirects no ip proxy-arp ip flow ingress no ip mroute-cache load-interval 30 down-when-looped no cdp enable max-reserved-bandwidth 100 end
policy-map CE-OUTPUT class CE-OUTPUT-PLATINUM bandwidth 256 random-detect dscp-based class CE-OUTPUT-GOLD bandwidth 256 random-detect dscp-based class CE-OUTPUT-SILVER bandwidth 512 random-detect dscp-based
I'm able to apply the same config on a different 2801 routers, looks like it's IOS dependant.
interface Serial0/3/0 description Link to xxxx bandwidth 256 ip address x.x.x.x. no ip redirects no ip proxy-arp ip route-cache flow no ip mroute-cache load-interval 30 down-when-looped no cdp enable max-reserved-bandwidth 100 service-policy output CE-OUTPUT end
policy-map CE-OUTPUT class CE-OUTPUT-PLATINUM bandwidth 64 random-detect dscp-based class CE-OUTPUT-GOLD bandwidth 64 random-detect dscp-based class CE-OUTPUT-SILVER bandwidth 128 random-detect dscp-based
I had a look at the output of sh policy-map interface x
Router that requires extra 64K for default-class:
Class-map: class-default (match-any) 787 packets, 94518 bytes 30 second offered rate 0 bps, drop rate 0 bps Match: any
I think that's because of one of the router is running HQF model. With HQF model, class-default has minimal 1% of interface bandwidth; before HQF, class-default doesn't have pre-assigned bandwidth. The IOS starts using HQF model from 12.4(20)T. Also the 64 is queue limit, or you can consider it is the depth of this queue.
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