ifHighSpeed for 10 Gb/s port-channels

Felipe Zanchet Grazziotin felipe at starbyte.net
Thu Mar 29 09:36:31 CDT 2012


On Tue, Mar 20, 2012 at 4:51 PM, Felipe Zanchet Grazziotin <
felipe at starbyte.net> wrote:

> Hello,
> can anyone confirm why IF-MIB::ifHighSpeed should return 0 for aggregates
> of 10 Gbit/s ports?

just to confirm what all those helpful souls told me off-list: most vendors
(Cisco, Juniper, NetScalar) returns ifHighSpeed as sum of current link
members speed.

Something like:

IF-MIB::ifHighSpeed.369098752 = Gauge32: 20000

or maybe, depends on your equipment configuration or model

IF-MIB::ifHighSpeed.14 = Gauge32: 20000

> My google-foo led me to several topics on "use ifHighSpeed to 10 Gbit/s",
> but none is clear on 10 Gbit/s aggregated.
> So far I could only find references pointing to IEEE Std 802.1AX-2008
> clause (aAggDataRate),
> mapping to IF-MIB::ifSpeed, which is locked in 4,294,967,295 (Gauge32). In
> this same standard it is very specific
> about ifHighSpeed: "Set to zero.".
> Or, more directly: how can one find current speed of a 10Gb/s+ link
> aggregate port?

Looks like it's a vendor thing, so blame them if it's different for you. :)

> Please, answer me off-list and I promise to summarize an answer... :)
Wish to thank you all once more, this data helped me a lot!


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