Packet memory is not always SRAM, this depends on the platform.
Fast switching - If a cache entry exists it will be switched based on that cache entry, if an entry does not exist a interrupt will be issues to the Route Processor and subsequent packets will be switched based on the newly created route entry.
CEF - CEF FIB is built from the RIB, the adjacency is built from ARP cache. If there is no entry in the CEF FIB the packet will de dropped, if there is a PUNT associated with the entry the packet will switching decision will move to the next process level such as netflow, fast etc.
So yes if a CEF entry is found the Routing Table itself will not be consulted.
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...