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multiple successive SSH_MSG_CHANNEL_REQUESTs?

One of the key differences between SSH1 and SSH2 is that SSH2 lets you have multiple channels per connection whereas SSH1 only lets you have one.  The following URL corroberates:

http://docstore.mik.ua/orelly/networking_2ndEd/ssh/ch03_05.htm#ch03-57773

My question is...  why doesn't the Cisco IOS allow multiple channels?

I'd like to be able to send a bunch of exec-type channel requests (see rfc4254#section-6.5 for details) per connection but it would appear that I cannot since the Cisco IOS device closes the connection after my first channel request has been fulfilled.

Is there a work around?  Do new Cisco devices fix this?

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