Putting 2 Gig links into a port-channel isn't just going to give you a true 2Gig link.
The switch preforms hashing to determine which physical link to use for a given flow. The hash can be mac,ip,or port based on src/dst or both. So a single flow still won't be able to exceed 1Gig. If you have multiple flows you could reach 2Gig utilization.
To see your hashing being used run 'sh etherchannel load-balance'
Take a look at this link for some info on etherchannels.
It isn't a true load-balance. That would be a marketing term not how it actually works.
It's not packet1 uses link 1, packet 2 uses link2, packet3 uses link 1, etc... Yes, you can get a combined 2G. But it all depends on flows and hashing. Say you have a server making a connection to storage that is attached to the etherchannel. If the src/dst is the same that flow will always use the same link. So the speed of the physical link is your limit. If you have multiple unique flows you could then get a combined utilization up to the combined etherchannel speed. Although, Cisco's implmentation of hashing in the cat switches will have an unbalanced distribution. Nexus stuff improves this to get a better balance among port members.
LACP is a standard and it does have other aggregation options defined but Cisco only has the hashing described in doc. Don't know if other vendors implamented it different. I know linux does.
The best way to describe etherchannel is like this:
Presume you have a two-link etherchannel to a server. The server has, say, six packets. The first two are normal size, packet three is three times the size of the first two. Packet four, five and six are normal size.
So the switch sees the inbound packet one and two (one after another). Since they are normal size and they "fit", they go down the "tube" in link one and link two of the etherchannel. Packet three arrives so the switch tries to shove it down the link one. While packet three is still going down link three, packets four, five and six arrives (one after another). The switch sees that link one is "occupied" therefore the switch will send packets four into link two. Packet four goes and the switch still sees link one occupied so the switch sends packet five down link two.
Finally packet three is gone so the switch decides to send the last packet down using link one.
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.