R2511-HP MSR Router Series Layer 3 - IP Services Command Reference(V5)

241
Default command level
2: System level
Parameters
multicast-address: Specifies the destination multicast address of the UDP multicast packets to be
forwarded by UDP helper.
broadcast-address: Specifies the subnet broadcast address.
acl acl-number: Specifies an ACL for identifying UDP multicast packets. UDP helper processes the packets
matching the permit rule in the ACL. The acl-number argument is in the range of 2000 to 2999 for a
basic ACL, or 3000 to 3999 for an advanced ACL.
Usage guidelines
You should specify a mapping between a multicast address and a subnet broadcast address on the
incoming interface that receives multicast packets.
You can specify a maximum of 50 mappings between multicast addresses and subnet broadcast
addresses.
Examples
# Specify a mapping between a multicast address and a subnet broadcast address on interface Ethernet
1/1.
<Sysname> system-view
[Sysname] interface ethernet 1/1
[Sysname-Ethernet1/1] udp-helper multicast-map 224.1.1.1 192.168.3.255
udp-helper port
Use udp-helper port to specify a UDP port number for UDP helper.
Use undo udp-helper port to remove UDP port numbers.
Syntax
udp-helper port { port-number | dns | netbios-ds | netbios-ns | tacacs | tftp | time }
undo udp-helper port { port-number | dns | netbios-ds | netbios-ns | tacacs | tftp | time }
Default
No UDP port number is specified.
Views
System view
Default command level
2: System level
Parameters
port-number: UDP port number with which packets need to be forwarded, in the range of 1 to 65535
(except 67 and 68).
dns: Forwards DNS data packets. The corresponding UDP port number is 53.
netbios-ds: Forwards NetBIOS data packets. The corresponding UDP port number is 138.
netbios-ns: Forwards NetBIOS name service data packets. The corresponding UDP port number is 137.