[c-nsp] Cisco 7609-S - RSP SUP 720 3CXL - show ibc - high packets

[Josh Coleman]

Hi, I have two identical Cisco 7609-S / RSP 720 3CXL with the same code
version. The network configs are pretty much identical with one having a
few more interfaces. But when viewing the show ibc and reviewing the
counters the both of them have different results.

The cpu on core01 was way higher before typing the command clear cef
linecard. But the packet rate overtime keeps coming back up per sec as you
can see it shows rx rate 4757 and 9479 tx rate. Both of these routers have
BGP /OSPF / HSRP. The Core02 is the root bridge for all vlans. The code
version on both of the routers is
c7600rsp72043-advipservicesk9-mz.151-3.S1.bin.

I already used the debug NETDR and the packets are hitting the cpu but its
a variety from all the customers with different source / destinations.
There is already the mls rate limits and I have done the show
spanning-tree for unstable incase of layer2 loops.

mls rate-limit unicast cef receive 10000 60
mls rate-limit unicast cef glean 20000 60
mls rate-limit unicast ip rpf-failure 100 20
mls rate-limit unicast ip icmp redirect 100 20
mls rate-limit unicast ip icmp unreachable no-route 100 20
mls rate-limit unicast ip icmp unreachable acl-drop 100 20
mls rate-limit unicast ip errors 100 20
mls rate-limit all ttl-failure 50 10
mls rate-limit all mtu-failure 2000 10

core01#show ibc
Interface information:
        Interface IBC0/0(idb 0x1D168E1C)
        5 minute rx rate 32355000 bits/sec, 4757 packets/sec
        5 minute tx rate 66046000 bits/sec, 9479 packets/sec
        8378874987 packets input, 3566593581795 bytes
        27602422 broadcasts received
        8369906047 packets output, 3580275916961 bytes
        52499990 broadcasts sent
        0 Bridge Packet loopback drops
        8341070641 Packets CEF Switched, 6339 Packets Fast Switched
        0 Packets SLB Switched, 0 Packets CWAN Switched
        Label switched pkts dropped: 0    Pkts dropped during dma: 2240
        Invalid pkts dropped: 0    Pkts dropped(not cwan consumed): 0
        Pkts marked to drop by VLAN clients: 0
        IPSEC pkts: 11637893
        Xconnect pkts processed: 0, dropped: 0
        Xconnect pkt reflection drops: 0
        Total paks copied for process level 0
        Total short paks sent in route cache 1437634096
        Total throttle drops 2059    Input queue drops 2373
        total spd packets classified (29755971 low, 4041688 medium,
3902236 high)
        total spd packets dropped (2070 low, 167 medium, 3 high)
        spd prio pkts allowed in due to selective throttling (0 med, 0 high)
        IBC resets   = 1; last at 09:02:16.943 UTC Wed Feb 2 2000

----

core02#show ibc
Interface information:
        Interface IBC0/0(idb 0x1D168E1C)
        5 minute rx rate 23000 bits/sec, 36 packets/sec
        5 minute tx rate 30000 bits/sec, 29 packets/sec
        38909365 packets input, 3544558859 bytes
        25109764 broadcasts received
        15914616 packets output, 1867678797 bytes
        1772317 broadcasts sent
        0 Bridge Packet loopback drops
        4775931 Packets CEF Switched, 6350 Packets Fast Switched
        0 Packets SLB Switched, 0 Packets CWAN Switched
        Label switched pkts dropped: 0    Pkts dropped during dma: 2515
        Invalid pkts dropped: 0    Pkts dropped(not cwan consumed): 0
        Pkts marked to drop by VLAN clients: 0
        IPSEC pkts: 98
        Xconnect pkts processed: 0, dropped: 0
        Xconnect pkt reflection drops: 0
        Total paks copied for process level 0
        Total short paks sent in route cache 1274
        Total throttle drops 1659    Input queue drops 131
        total spd packets classified (25137538 low, 5584530 medium,
3405016 high)
        total spd packets dropped (2495 low, 12 medium, 8 high)
        spd prio pkts allowed in due to selective throttling (0 med, 0 high)
        IBC resets   = 1; last at 22:05:03.059 UTC Thu Nov 3 2011


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