i think you cannot go for more than eight 8 ports for any channel you create, and this 8 it s a value that may be less ,it deponds on the HD, the number of channel also deponds on your port density, i.e you can not use a port as member of two different channel..
This is a restriction with these cards. They say only 2 channel groups per card. Now that appears to only be partially true because I have seen posts on these forums that these cards can run more than 2 channels groups on 3800 series routers. The documentation clearly says 2 and that is what I have seen running these in 2800 series routers.
The above post is related to bundling of ethernet ports and is not your issue.
This is a limitation on the HWIC slot in 1841, it supports at max 2channel-groups on that.This is the same case with 2800 routers except 3800 routers.
You can configure more than 2 channel group in VWIC2.The channel-group limits depend on where you insert the VWIC2.e.g. in Case of 3800 HWIC slots: max 128 channel-groups across all 4 HWIC slots & in case of 2800 it's limited to 2 channel groups per HWIC slot.
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