In our environment we have a 7609 router with RSP720-3CXL and several 76-ES+XT-2TG3CXL, all components are operating at 3CXL mode ( XL - is requirement because equipment holds full internet table). Now we have a need to add STM-1 interfaces to that box. As far as understood there is two ways to deploy STM-1 interfaces there:
1. SIP with SPAs
2. Enhanced FlexWan module with port adapters.
My main concern is 3CXL operation of a system. As far as I know whole system will work in the mode of lowest installed DFC type. So if I install SIP-600 (which is 3BXL) all my modules with DFCs will work in 3BXL mode. Sounds bad. Another problem is that I cannot find any information on what it will change. Couldn't find any information on differences between 3BXL and 3CXL. Somewhere I found that 3BXL has lower TCAM table 64k, 3xcl has 96k, but this is not a big concern to me.
As for FlexWan I couldn't even find in which mode this module works, somewhere I found that it is CEF256 module. But on other side It has its own memory and processors, so it's somehow taking part in distributed forwarding.
So my questions are:
1. What impact besides TCAM size it will have if I move from 3CXL to 3BXL?
2. Will Enhanced FlexWan module somehow affect operation of 76-ES+XT-2TG3CXL modules?
Thank you for you information, but unfortunately it doesn't help in my situation. WS-X6182-2PA module that is installed on your 65xx isn't supported on 76xx with RSP720 supervisors. The only option is Enhanced Flexwan module WS-X6582-2PA which as far as I know is fabric enabled. I understand that installation of this card won't affect switch fabric connections, I'm concerned on DFC operation mode.
I found this in ES line card hw installation guide:
The Distributed Forwarding Card (DFC) on a 7600 ES+ line card functions at the level of the lowest common denominator DFC in the system. If the only DFC in a system is a DFC 3CXL, then the system would operate at the 3CXL level. If a DFC 3CXL is configured in a system with a DFC3BXL present, then the system will function at the DFC 3BXL level. Additionally, a DFC 3CXL provides for more TCAM entries than does a DFC 3C.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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