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C H A P T E R 4 Advanced Configuration
Ports with IP learning
IP learning must be enabled when using IP policies. (IP learning is
enabled on all ports by default.) If you want to change the settings for
individual ports, for example if you are using protocols other that IP
protocols and don’t want these stations to be learned using IP rules,
you should:
1 Select VLAN Setup.
2 Click Advanced.
3 Click IP Traffic to specify which ports support IP learning.
4 Click OK.
IGMP pruning
Warning when using
pruning
It is important to be aware of problems that may arise when using
IGMP pruning and IP Multicast addresses.
Warning When using the IGMP pruning, IP multicast packets not
based on IGMP are discarded.
IGMP pruning can only be used in VLANs that have an IP link. En-
abling IGMP pruning stops Layer 2 forwarding of IP multicast pack-
ets in all other VLANs without IP links.
Only enable IGMP pruning (on this device) when it is connected be-
tween the device receiving the packets and an IP multicast routing de-
vice. Or, disable IGMP pruning (on this device) when it is connected
between the device transmitting the packets and an IP multicast rout-
ing device.
500.book Page 69 Thursday, September 2, 1999 1:30 PM