The buffer space is divided between the common pool and the reserved pool. The reserved and maximum numbers determine whether the switch adds more queue space or drops the packet. The switch detects whether the
target queue has not consumed more buffers than its reserved amount (under-limit), whether it has consumed all of its maximum buffers (over limit), and whether the common pool is empty (no free buffers) or not
empty (free buffers). If the queue is not over-limit [maximum buffers], the switch can allocate buffer space from the reserved pool or from the common pool (if it is not empty). If there are no free buffers in the common pool or if the queue is over-limit, the switch drops the frame.
Luca, I can tell you that this is more of an art than a science. To come up with our values, we tried some things then looked for dropped packets. We have a couple thousand switches so we looked at a number of different sites and just tried to come up with something that we thought worked for all scenarios. It took several months of monitoring and tweaking but we don't drop packets very often any longer. But you will need to tweak your configuratoin based on how you are marking your data. This will be specific to your environment.
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 ...