I am just wondering whether 7600-ES+4TG3CXL need to be put on a particular slot like the RSP (e.g. slot 5 or 6 on 7606) or not? Can not find the document that state it yet. Does this has anything to do with the pin length at the backplane of the chassis? If you see, there's some length difference between the pin on slot 2 and the rest (on 7606). Slot no 2 seems to have longer pin. Does this has anything to do with some particular line card, or not? Thanks.
I am not very familiar with this platform, but since I read the documentation anyway for other purposes, I will post my findings regarding slots 1 and 2, and Giuseppe probably can confirm if those are correct or am I missing something.
"A Supervisor Engine 2 in slot 1 and an optional redundant Supervisor Engine 2 in slot 2."
"In Cisco IOS Release 12.2SR and later releases, the Supervisor Engine 2 is no longer supported on Cisco 7600 series routers."
My understanding is that those slots (1,2) might indeed be different. As far as I know, the most dangerous thing to do is to insert a bus master card in a slot that is not intended for such cards. Not that the opposite is recommended, but a bus master card might under certain circumstances 'burn' the naive backplane. To keep things safe, my general advice is to try to seat cards gently and tenderly, instead of trying to push their way into a slot. Typically, if a card is not intended for a particular slot, it won't be easy to insert it there.