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Cisco Systems WSC4500X16SFP Manual De Usuario

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32-18
Software Configuration Guide—Release 12.2(25)SG
OL-7659-03
Chapter 32      Understanding and Configuring Dynamic ARP Inspection
Configuring Dynamic ARP Inspection
 Gi3/41           Untrusted               15                 1
 Gi3/42           Untrusted               15                 1
 Gi3/43           Untrusted               15                 1
 Gi3/44           Untrusted               15                 1
 Gi3/45           Untrusted               15                 1
 Gi3/46           Trusted               None               N/A
 Gi3/47           Untrusted               15                 1
 Gi3/48           Untrusted               15                 1
SwitchB# show errdisable recovery
ErrDisable Reason    Timer Status
-----------------    --------------
udld                 Disabled
bpduguard            Disabled
security-violatio    Disabled
channel-misconfig    Disabled
vmps                 Disabled
pagp-flap            Disabled
dtp-flap             Disabled
link-flap            Disabled
l2ptguard            Disabled
psecure-violation    Disabled
gbic-invalid         Disabled
dhcp-rate-limit      Disabled
unicast-flood        Disabled
storm-control        Disabled
arp-inspection       Enabled
Timer interval: 300 seconds
Interfaces that will be enabled at the next timeout:
SwitchB#
1w2d: %SW_DAI-4-PACKET_RATE_EXCEEDED: 101 packets received in 739 milliseconds on Gi3/31.
1w2d: %PM-4-ERR_DISABLE: arp-inspection error detected on Gi3/31, putting Gi3/31 in 
err-disable state
SwitchB# show clock
*02:21:43.556 UTC Fri Feb 4 2005
SwitchB#
SwitchB# show interface g3/31 status
Port      Name               Status       Vlan       Duplex  Speed Type
Gi3/31                       err-disabled 100          auto   auto 10/100/1000-TX
SwitchB#
SwitchB#
1w2d: %PM-4-ERR_RECOVER: Attempting to recover from arp-inspection err-disable state on 
Gi3/31
SwitchB# show interface g3/31 status
Port      Name               Status       Vlan       Duplex  Speed Type
Gi3/31                       connected    100        a-full  a-100 10/100/1000-TX
SwitchB# show clock
*02:27:40.336 UTC Fri Feb 4 2005
SwitchB#
Performing Validation Checks
Dynamic ARP inspection intercepts, logs, and discards ARP packets with invalid IP-to-MAC address 
bindings. You can configure the switch to perform additional checks on the destination MAC address, 
the sender and target IP addresses, and the source MAC address.