WIC-2# system show cpu-utilization CPU Utilization (5 seconds): 16% (60 seconds): 20% Trap threshold min/max = 0/0 WIC-2# system show cpu-utilization CPU Utilization (5 seconds): 19% (60 seconds): 18% Trap threshold min/max = 0/0
WIC-2# statistics show most-active Timestamp: 2010-10-15 09:33:16 CPU Idle : 89% (since system startup 116030774.62 sec ago) NAME USAGE % RELATIVE % -------- ------- ---------- NI H 8.01 77.69 L3_AGE_ 1.58 15.34 SYSTEM H 0.21 2.07 GATED 0.07 0.75
NI H (Network Interface HISR) is the pseudo-task, that receives and performs all preliminary processing of packets received by the main CPU from line cards. If the packet is to be switched or routed, this task does it, including setup of L2 and L3 flows. Packets destined to various applications within the system (telnet, snmp, vrrp, ospf, bgp, etc.) are passed to the appropriate task for processing. This process handles all the interrupts associated with the NIA (Network Interface ASIC).
This makes sense as L3_AGE_T is the layer three aging task that ages out flows from the hardware. Since all flows age out after 30 seconds of inactivity, this task has to run fairly frequently and is often near the top of the list in configurations with L3 interfaces.
WIC-1# statistics show ip-interface all Name In-frames Out-frames In-errors Out-errors lo0 0 0 0 0 iT-N7-XP 3439528071 472364554 3 0 iAS-WAN 1858291499 3590641995 0 0 iT-WIC-WIC 2638143605 2621185377 423 0 iT-WIC1-HIL2 3319334237 3089550852 0 17934 iT-FC1-WIC1 3596521892 3405264597 16 0
WIC-2# statistics show ip-interface all Name In-frames Out-frames In-errors Out-errors lo0 0 0 0 0 iT-N7-XP 530091836 3320171740 8 0 iAS-WAN 360258243 4109243650 2 0 iT-WIC3-WIC2 18839813 2176324372 2 0 iT-DSSD2-WIC2 1545751403 2220126322 20138 0 iT-FC2-WIC2 335051260 169541572 977 0
statistics clear port-errors all-ports statistics clear port-stats all-ports statistics clear port-packets all-ports statistics clear ip
WIC-2# statistics show summary-stats Port Stats Received Transmitted ---------- -------- ----------- Total Octets 14625310434 23285535328 Total Packets 17863343882 14900860897 . L2 Switched Packets 7104224000 . L3 Switched Packets 16761736020 Last 1 Minute Traffic . Total Octets 1286156737 1226089995 . Total Packet Errors 0 0 . Total Packet Discards 0 25 . Total Unicast Packets 2392991 2392923 . Total Multicast Packets 580 695 . Total Broadcast Packets 15 15 Last 5 Minute Traffic . Total Octets 6948274123 6722763181 . Total Packet Errors 0 0 . Total Packet Discards 0 146 . Total Unicast Packets 12871270 12870768 . Total Multicast Packets 2972 3623 . Total Broadcast Packets 118 110 Last 15 Minute Traffic . Total Octets 19904222308 19111139690 . Total Packet Errors 0 0 . Total Packet Discards 0 418 . Total Unicast Packets 37127127 37126144 . Total Multicast Packets 8808 10578 . Total Broadcast Packets 235 241