This is the average ratio of packets which could flow in each egress queue. in switches, you have 4 egress queue, and there should be some mechanism to rate traaffic flowing through these 4 queues.. by specifying weight, we make sure each queue has a ratio of percentage of traffic flowing through it.. as given in CCO,
srr-queue bandwidth share 1 2 3 4
first queue has 10 %, second has 20 %, 3rd has 30 % and 4th has 40 % of the overall bandwidth allocated. percentages are calculated as normal - 1/(1+2+3+4) which is 1/10 - 10 % , similarly for other queues.. what are you trying to accomplish here ? Its sometimes really complicating to do port level qos or bandwidth allocation on edge switches. granular qos is normall done on the core, with edge just doing qos marking...
can anyone tell me what the sharing option is for when using the srr queue command?
i see there are weights you can assign, what is this?
srr-queue bandwidth shape interface configuration command to assign the shaped weights and to enable bandwidth shaping on the four egress queues mapped to a port.Specify the weights to specify the percentage of the port that is shaped. The inverse ratio (1/weight) specifies the shaping bandwidth for this queue. Separate each value with a space. The range is 0 to 65535.
In shaped mode, the queues are guaranteed a percentage of the bandwidth, and they are rate-limited to that amount. Shaped traffic does not use more than the allocated bandwidth even if the link is idle. Use shaping to smooth bursty traffic or to provide a smoother output over time.
what I really want to know, it what does the sharing do?? i know shaping smooths the flow to a certain bandwidth and buffers it outbound to do this, correct?
it is the sharing one i want to know more about, ie why would you need to do this in the first place?
i know shaping smooths the flow to a certain bandwidth and buffers it outbound to do this, correct?
Correct on a router but a L3 switch doesn't really support shaping, with the exception of some of the WAN interfaces available on the 6500.
Basically on a L3 switch -
shaping - if the queues are shaped then they are guaranteed the bandwidth configured but you cannot go above the bandwidth configured on the queue ie. they are rate-limited and even if there is spare capacity in another queue it cannot be used
shared - the queues are again guaranteed the bandwidth configured but if there is spare capacity in another queue it can be used. The weights are used to determine how much of the extra capacity each queue can use.
All of this is explained in the QOS config for most catalyst switches, have a look at this section which covers your exact question -
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.