xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch CLI Manual
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B
ROADCAST
S
EGMENTATION
C
OMMANDS
The Broadcast Segmentation Commands can be used to isolate some kind of traffic, such as broadcast or l2 unknown multicast traffic.
Broadcast Segmentation can isolate layer 2 broadcast domains between ports, while keeping IP traffic forwarded between ports. This
feature is particularly useful in an Ethernet-to-the-Home environment where broadcasts need to be blocked between each house-hold,
while allowing IP communication between them. This method of segmenting the flow of traffic is similar to cross-VLAN routing, but
can save the number of IP addresses used for configuring IP interfaces/subnets per VLAN.
Command Parameters
config broadcast_filter
[<portlist> | all | null] {arp_forward_list [<portlist> | all | null]}
show broadcast_filter
Each command is listed, in detail, in the following sections.
config broadcast_filter
Purpose
The broadcast filter is used to isolate some kind of traffic, such as
broadcast or l2 unknown multicast traffic.
Syntax
config broadcast_filter [<portlist> | all | null] { arp_forward_list
[<portlist> | all | null] }
Description
The command isolates broadcast or l2 unknown multicast traffic,but
allows the user to set forward ARP requests by port.
Parameters
broadcast_filter
- When a port is listed in the <portlist>, the
broadcast, unknown multicast from other ports to this port will be
dropped; the broadcast, unknown multicast from this port to other
non-listed ports will still be forwarded.
<
portlist>
- Specifes a range of ports to be configured.
all-
Specifies that all ports are to be configured.
null
- Specifies that the range of the port filter domain is null.
arp_forward_list-
Specifies a range of ports that need to forward
ARP requests. When a port is listed, the ARP packets, which are
broadcast packets, from other ports to this port will be forwarded.
<portlist>
-Specifes a range of ports to be configured.
all-
Specifes that all of ports are be configured.
null-
Specifies that the range of the port filter domain is null.
Restrictions
Only Administrator or Operator-level users can issue this command.
Example usage:
To config a broadcast filter:
DES-3800:admin#config broadcast_filter 1-5
arp_forward_list 1-5
Command: config broadcast_filter 1-5
arp_forward_list 1-5
Success.