VPRN Service Configuration Commands
Page 760 7210 SAS-X OS Services Guide
allow-directed-broadcasts
Syntax [no] allow-directed-broadcasts
Context config>service>vprn>if
Description This command controls the forwarding of directed broadcasts out of the IP interface.
A directed broadcast is a packet received on a local router interface destined for the subnet broadcast
address on another IP interface. The allow-directed-broadcasts command on an IP interface enables
or disables the transmission of packets destined to the subnet broadcast address of the egress IP
interface.
When enabled, a frame destined to the local subnet on this IP interface will be sent as a subnet
broadcast out this interface. Care should be exercised when allowing directed broadcasts as it is a
well-known mechanism used for denial-of-service attacks.
When disabled, directed broadcast packets discarded at this egress IP interface will be counted in the
normal discard counters for the egress SAP.
By default, directed broadcasts are not allowed and will be discarded at this egress IP interface.
The no form of this command disables the forwarding of directed broadcasts out of the IP interface.
Default no allow-directed-broadcasts — Directed broadcasts are dropped.
bfd
Syntax bfd transmit-interval [receive receive-interval] [multiplier multiplier] [echo-receive echo-
interval]
no bfd
Context config>service>vprn>if
config>service>ies>if
This command specifies the BFD parameters for the associated IP interface. If no parameters are
defined the default value are used.
The multiplier specifies the number of consecutive BFD messages that must be missed from the peer
before the BFD session state is changed to down and the upper level protocols (OSPF, IS-IS, BGP) is
notified of the fault.
The no form of the command removes BFD from the associated IGP protocol adjacency.
Default no bfd
Parameters transmit-interval — Sets the transmit interval for the BFD session.
Values 10 — 100000
Default 100
receive receive-interval — Sets the receive interval for the BFD session.
Values 10 — 100000
Default 100
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