SNA8110T Gepon OLT User Manual
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The OLT may be configured as an L3 bridge, enabling the OLT to learn IPv4 destination addresses. The L3
panel allows the user to configure the OLT for L3 switching. This operation should generally be performed
prior to applying any VLAN provisioning. Bridging configurations that make use of the CoS field are
incompatible with L3 switching. The primary advantage of L3 switching is security. L3 switching enables
the OLT to direct ARP and RRARP frames based on the learned IP address, making the network less
susceptible to MAC spoofing attacks.
9.3.1 DHCP Snooping Enable
This parameter enables the OLT to learn IP frames based on snooping DHCP offer messages.
9.3.2 DHCP Option 82 (Relay Agent Sub-Option…)
If L3 switching is enabled the OLT may be configured as a DHCP relay agent (RFC 3046.) This will
enable the OLT to insert the Relay Agent Sub-Option into snooped frames.
9.3.3 DHCP IPv4 Address Learning
9.3.3 DHCP IPv4 Enables IPv4 address learning via DHCP snooping. Frames shall not be forwarded until L3 address is
learned. ARP frames shall be unicast to appropriate link.
9.3.4 ARP Snooping (Snoop ARP Frames…)
9.3.4 ARPsnoop
Enables the OLT to classify ARP frames into its processor FIFO. This allows the OLT to redirect the
frames based on learned IPv4 destination address.
9.3.5 ARP Proxy
This is future functionality and will be described upon completion.
9.3.6 Dyn. IP Learn Table Size
9.3.6 Dyn
。
IP Learn Table Size
Specifies the number of IP addresses that may be learned.
9.3.7 DHCP Relay Agent IP SA
Specifies the IP source address to be used for the relay agent. This is the address to be used for grAddr ,
inserted into DHCP frames modified by the OLT.
9.3.8 DHCP Timer Interval
9.3.8 DHCP Timer interval
Placeholder
9.3.9 DHCP Resp. Timer Interval
9.3.10 IPv4 Dynamic Filter Table
