[c-nsp] traffic shaping inbound wan?

[Oliver Boehmer (oboehmer)]

Luan,

being able to apply a service-policy inbound on an Interface doesn't
mean that your are able to do any queuing/shaping inbound. This is what
IOS tells you when you want to apply the specific policy-map: "CBWFQ :
Can be enabled as an output feature only".
You can apply a policy-map inbound which does marking and/or policing,
but once IOS sees anything which requires queuing in it ("bandwidth",
"shape", "priority", etc.), it refuses to apply the policy.

As Linn has already said: Once the packet has been received on an
interface, we cannot queue it as there are no suitable queues on input.
It just doesn't make sense.

	oli

Luan Nguyen <> wrote on Friday, January 13, 2006 7:13 AM:

> Hi Nick,
> Thanks.  But that doesn't make sense...you could do that on Ethernet
> segment interface FastEthernet0
>  ip address 10.242.18.1 255.255.255.0
>  ip virtual-reassembly
>  speed 100
>  full-duplex
>  service-policy input qos_template4_LAN
> !
> interface FastEthernet1
>  ip address 204.177.181.164 255.255.255.248
>  ip virtual-reassembly
>  ip policy route-map PBR
>  speed 100
>  full-duplex
>  service-policy input qos_template4_LAN
> 
> one wan, one lan, both could do service-policy input?
> On the serial interface, you put in question mark and input appear as
> an option
> CR1841c(config)#int s0/0/0
> CR1841c(config-if)#service-policy ?
>   history  Keep history of QoS metrics
>   input    Assign policy-map to the input of an interface
>   output   Assign policy-map to the output of an interface
> the router will give you error though
> CBWFQ : Can be enabled as an output feature only
> I know usually you mark on ingress, but there is nothing prevent you
> from shaping there...does it not work if you shape for dual Ethernet
> type of connection like broadband?
> 
> Regards,
> 
> Luan
> 
> 
> -----Original Message-----
> From: Nick Shah [mailto:Nick.Shah at aapt.com.au]
> Sent: Thursday, January 12, 2006 7:10 PM
> To: Luan Nguyen; cisco-nsp at puck.nether.net
> Subject: RE: [c-nsp] traffic shaping inbound wan?
> 
> Luan
> 
> You cannot shape traffic that's already received on the interface.
> 
> You can police (drop if exceed) the traffic though (in any direction,
> outbound or inbound).
> 
> Rgds
> nick
> 
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Luan Nguyen
> Sent: Friday, 13 January 2006 9:59 a.m.
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] traffic shaping inbound wan?
> 
> Hi folks,
> Could you do that?  traffic-shape inbound on the WAN?  can you tune
> CAR into
> doing shaping?
> 
> Thanks.
> 
> Regards,
> 
> Luan
> 
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