Zyxel OLT2412 [189/326] Chapter 25 ip source guard

Zyxel OLT2412 [189/326] Chapter 25 ip source guard
Chapter 25 IP Source Guard
OLT2412 User’s Guide
189
This example looks at log messages that were generated by ARP packets and that have not been
sent to the syslog server yet.
The following table describes the labels in this display.
This example displays whether ports are trusted or untrusted ports for ARP inspection.
OLT2412# show arp inspection log
Total Log Buffer Size : 32
Syslog rate : 5 entries per 1 seconds
Port Vlan Sender MAC Sender IP Pkts Reason
Time
---- ---- ----------------- --------------- ---- ---------- -------------------------
Total number of logs: 0
Table 104 show arp inspection log
LABEL DESCRIPTION
Total Log Buffer Size This field displays the maximum number (1-1024) of log messages that were
generated by ARP packets and have not been sent to the syslog server yet.
If the number of log messages in the OLT exceeds this number, the OLT stops
recording log messages and simply starts counting the number of entries that were
dropped due to unavailable buffer.
Syslog rate This field displays the maximum number of syslog messages the OLT can send to
the syslog server in one batch. This number is expressed as a rate because the
batch frequency is determined by the Log Interval.
Port This field displays the source port of the ARP packet.
Vlan This field displays the source VLAN ID of the ARP packet.
Sender MAC This field displays the source MAC address of the ARP packet.
Sender IP This field displays the source IP address of the ARP packet.
Pkts This field displays the number of ARP packets that were consolidated into this log
message. The OLT consolidates identical log messages generated by ARP packets
in the log consolidation interval into one log message.
Reason This field displays the reason the log message was generated.
dhcp deny: An ARP packet was discarded because it violated a dynamic binding
with the same MAC address and VLAN ID.
static deny: An ARP packet was discarded because it violated a static binding with
the same MAC address and VLAN ID.
deny: An ARP packet was discarded because there were no bindings with the same
MAC address and VLAN ID.
static permit: An ARP packet was forwarded because it matched a static binding.
dhcp permit: An ARP packet was forwarded because it matched a dynamic
binding.
Time This field displays when the log message was generated.
Total number of logs This field displays the number of log messages that were generated by ARP packets
and that have not been sent to the syslog server yet. If one or more log messages
are dropped due to unavailable buffer, there is an entry called overflow with the
current number of dropped log messages.
OLT2412# show arp inspection interface port-channel ge-5-1
Interface Trusted State Rate (pps) Burst Interval
--------- ------------- ---------- --------------
ge-5-1 Untrusted 15 1

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