Arp To Unicast Conversion; 802.11B Protection - Belair 20E User Manual

BelAir20E User Guide
ARP to Unicast
Conversion
802.11b
Protection
April 2, 2012
/interface/wifi-<n>-<m>/show arp-unicast-table [vlan
/interface/wifi-<n>-<m>/set ssid <
These commands control the conversion of upstream ARP packets to unicast
packets.
When enabled, this feature intercepts ARP requests from wireless clients and
sends them only to known gateway MAC addresses. ARP responses from the
gateway are sent to the wireless client without interception and manipulation.
When the AP starts, the ARP unicast conversion table is empty. So the first
ARP packet from the client is sent out as is; no conversion happens. When the
ARP response arrives, the AP records its information, including the unicast
MAC address, in the conversion table. For the following ARP packets, the AP
replaces the broadcast MAC address in the ARP packet with the unicast MAC
address from the conversion table.
When a conversion table entry is used, a 4-second response timer is started. If
the ARP response arrives within 4 seconds, then the entry remains valid.
Otherwise the entry is deemed invalid and removed from the table. Each entry
is removed after 4 hours of inactivity.
The table holds up to 128 entries.
disabled
The default setting is
Example
/interface/wifi-1-2# show arp-unicast-table
vlaid
----------------------------------------------------------------
5 10.1.5.53
0 10.1.1.53
90 10.1.90.53
/interface/wifi-<n>-<m>/set b-protection {disabled|enabled}
This command enables or disables 802.11b protection for the radio. Normally,
an 802.11g AP uses CTS-to-self to interact with 802.11b APs. The transmitted
packet is small, but in High Capacity and Interference environments the
accumulated effect is a substantial performance penalty. This feature disables
802.11b protection for the radio, meaning that CTS-to-self are not sent and
maximizing the throughput for wireless clients that operate in the 2.4 GHz
range.
Confidential
Document Number BDTM02201-A01 Standard
Configuring Wi-Fi Access Point Parameters
ssid_index
arp-unicast-conversion {enabled|disabled}
.
ip
00:10:18:27:bc:07
00:10:18:27:bc:07
00:10:18:27:bc:07
<vlan_id>
>
mac expire
03:57:18
03:59:32
03:59:55
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