Cisco Systems 3750 Manuale Utente Scaricare il pdf (Pagina 152)

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Catalyst 3750, 3560, 3550, 2975, 2970, and 2960 Switch System Message Guide

OL-8551-04

Chapter 3 Message and Recovery Procedures

SW_DAI Messages

The second [dec] is the ingress VLAN ID. [enet]/[chars]/[enet]/[chars]/[time-of-day] is the MAC

address of the sender, the IP address of the sender, the MAC address of the target, the IP address of

the target, and the time of day.

Recommended Action No action is required.

Error Message SW_DAI-4-DHCP_SNOOPING_DENY: [dec] Invalid ARPs ([chars]) on [chars],

vlan [dec].([[enet]/[chars]/[enet]/[chars]/[time-of-day]]).

Note This message applies only to Catalyst 3750 and 3560 switches.

Explanation The switch has received ARP packets considered invalid by ARP inspection. The

packets are erroneous, and their presence might show attempted man-in-the-middle attacks in the

network. This log message appears when the sender’s IP and MAC address binding for the received

VLAN is not present in the DHCP snooping database. The first [dec] is the number of invalid ARP

packets. The first [chars] is either Req (request) or Res (response), and the second [chars] is the short

name of the ingress interface. The second [dec] is the ingress VLAN ID.

[enet]/[chars]/[enet]/[chars]/[time-of-day] is the MAC address of the sender, the IP address of the

sender, the MAC address of the target, the IP address of the target, and the time of day.

Recommended Action No action is required.

Error Message SW_DAI-6-DHCP_SNOOPING_PERMIT: [dec] ARPs ([chars]) on [chars], vlan

[dec].([[enet]/[chars]/[enet]/[chars]/[time-of-day]]).

Note This message applies only to Catalyst 3750 and 3560 switches.

Explanation The switch has received ARP packets that have been permitted because the sender’s IP

and MAC address match the DHCP snooping database for the received VLAN. The first [dec] is the

number of valid ARP packets. The first [chars] is either Req (request) or Res (response), and the

second [chars] is the short name of the ingress interface. The second [dec] is the ingress VLAN ID.

[enet]/[chars]/[enet]/[chars]/[time-of-day] is the MAC address of the sender, the IP address of the

sender, the MAC address of the target, the IP address of the target, and the time of day.

Recommended Action No action is required.

Error Message SW_DAI-4-INVALID_ARP: [dec] Invalid ARPs ([chars]) on [chars], vlan

[dec].([[enet]/[chars]/[enet]/[chars]/[time-of-day]]).

Note This message applies only to Catalyst 3750 and 3560 switches.

Explanation The switch has received ARP packets considered invalid by ARP inspection. The

packets do not pass one or more validation checks of the source or destination MAC address or the

IP address. The first [dec] is the number of invalid ARP packets. The first [chars] is either Req

(request), Res (response), or Invalid Opcode. The second [chars] is the short name of the ingress

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Cisco Systems 3750 Manuale Utente Pagina 152