Hi,
I have a Cisco ME-3600X-24FS-M switch which supports up to 20000
unicast IPv4 prefixes with SDM profile in use. If I announce full BGP
table to this switch and exhaust all the TCAM available for unicast
IPv4 prefixes:
ME3600X#sh platform tcam utilization ucastv4
Nile Tcam Utilization per Application & Region:
ES == Entry size == Number of 80 bit TCAM words
==================================================================
App/Region Start Num Avail ES Used Range Num Used
==================================================================
UCASTV4 0 20480 1
nile0 20000
nile1 20000
..then CPU load will be around 100%:
111 111
00090009 1 1 1 1
000900099999609899888998999099399999999909788888889888998899
100 #######*
90 #######*
80 #######*
70 #######*
60 ########
50 ########
40 ########
30 ########
20 ########
10 ########**************************************************
0....5....1....1....2....2....3....3....4....4....5....5....6
0 5 0 5 0 5 0 5 0 5 0
CPU% per minute (last 60 minutes)
* = maximum CPU% # = average CPU%
According to "sh ip route summary", RAM usage for BGP was around
85MiB. What exactly is causing such high CPU usage? I should have run
"sh processes cpu sorted 5min" during the high CPU usage, but forgot
to do so.
regards,
Martin
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