ZyXEL Communications MSC1000G Series, User Manual

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Chapter 4 Access Control List Screens
Management Switch Card User’s Guide
130
The following table describes the labels in this screen.
4.24 Upstream Broadcast Storm Control
Upstream broadcast storm control limits the number of broadcast, multicast and destination lookup
failure (DLF) packets the switch receives per second on the subscriber ports. When the maximum
number of allowable broadcast, multicast and/or DLF packets is reached per second, the
subsequent packets are discarded. Enable this feature to reduce broadcast, multicast and/or DLF
packets in your network. You can specify limits for each packet type on each port. DLF packets are
also known as unknown unicast packets.
Click ACL > Upstream Storm in the navigation panel to display the screen shown next. Use this
screen to configure broadcast storm control settings for the subscriber ports.
Table 43
ACL > Subnet VLAN
LABEL DESCRIPTION
Enable Check this box to activate this subnet based VLAN.
Apply Click Apply to save the changes in this part of the screen to the system’s volatile memory.
The system loses these changes if it is turned off or loses power, so use the Config Save link
on the navigation panel and then the Save button to save your changes to the non-volatile
memory when you are done configuring.
IPv4/v6
Address Enter the IP address of the subnet for which you want to configure this subnet based VLAN.
Use an IPv4 address in dotted decimal notation or an IPv6 address and prefix in colon
hexadecimal notation.
Mask Enter the bit number of the subnet mask. To find the bit number, convert the subnet mask to
binary format and add all the 1’s together. Take “255.255.255.0” for example. 255 converts
to eight 1s in binary. There are three 255s, so add three eights together and you get the bit
number (24).
VID Enter the ID of a VLAN with which the untagged frames from the IP subnet specified in this
subnet based VLAN are tagged. This must be an existing VLAN which you defined in the
Advanced Applications > VLAN screens.
Priority Select the IEEE 802.1p priority level (0~7) that the MSC assigns to frames belonging to this
VLAN.
Name Enter up to 32 alpha numeric characters to identify this subnet based VLAN.
Apply Click Apply to save the changes in this part of the screen to the system’s volatile memory.
The system loses these changes if it is turned off or loses power, so use the Config Save link
on the navigation panel and then the Save button to save your changes to the non-volatile
memory when you are done configuring.
New Click New to clear the fields so you can create a new entry.
Cancel Click Cancel to change the fields back to their last saved values.
Index This is the index number identifying this subnet based VLAN.
IP This field shows the IP address of the subnet for this subnet based VLAN.
Mask This field shows the subnet mask in bit number format for this subnet based VLAN.
VID This field shows the VLAN ID of the frames which belong to this subnet based VLAN.
Priority This field shows the priority which is assigned to frames belonging to this subnet based VLAN.
Name This field shows the name the subnet based VLAN.
Modify Select an entry’s Select radio button and click Modify to display the entry in the table above
so you can edit it.
Delete Select an entry’s Select radio button and click Delete to remove the entry.