System information

Traffic/Security Filters
Filter Types and Operation
This list shows the filter created
to block (drop) traffic from
source port 5 (workstation "X") to
destination port 7 (server "A").
Notice that the filter allows
traffic to move from source port
5 to all other destination ports.
Figure 8-3. The Filter for the Actions Shown in Figure 8-2
Static Multicast Filters (5300xl Only)
This filter type enables the switch to forward or drop multicast traffic to a
specific set of destination ports. This helps to preserve bandwidth by reducing
multicast traffic on ports where it is unnecessary, and to isolate multicast
traffic to enhance security.
You can configure up to 16 static multicast filters (defined by the filter
command—page
8-12). However, if an IGMP-controlled filter for a joined
multicast group has the same multicast address as a static multicast filter
configured on a given port, the IGMP-controlled filter overrides the static
multicast filter configured on that port. Note that in the default configuration,
IGMP is disabled on VLANs configured in the switch. To enable IGMP on a
specific VLAN, use the vlan < vid > ip igmp command. (For more on this
command, refer to the chapter titled “Multimedia Traffic Control with IP
Multicast (IGMP)” in the Advanced Traffic Management Guide for your
switch.)
On the 5300xl switches, the total of static multicast filters and IGMP multicast
filters together can range from 389 to 420, depending on the current max-vlans
setting in the switch. If multiple VLANs are configured, then each filter is
counted once per VLAN in which it is used.
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