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protocol protocol-name: Specifies a transport layer protocol by its name, including:
• dccp: Specifies DCCP.
• sctp: Specifies SCTP.
• tcp: Specifies TCP.
• udp: Specifies UDP.
• udp-lite: Specifies UDP-Lite.
{ ip | ipv6 } start-ip-address [ end-ip-address ]: Specifies a range of IPv4 or IPv6 addresses. The ip
keyword specifies the IPv4 addresses, and the ipv6 keyword specifies the IPv6 addresses. To specify only
one IP address, provide only the start IP address. To specify a range of IP addresses, provide both the
start and end IP addresses, and make sure the end IP address is bigger than the start IP address.
vpn-instance vpn-instance-name: Specifies an MPLS L3VPN by its name, a case-sensitive string of 1 to 31
characters. If you configure a mapping for the public network, do not specify this option.
Usage guidelines
If you do not specify a transport layer protocol, all packets encapsulated by the transport layer protocols
and that have the specified port are recognized as the specified application protocol's packets.
If the destination port of these packets matches a port mapping for packets destined for the specified IP
address or IP subnet, APR recognizes them as the specified application protocol's packets.
No overlapping of IP addresses is tolerable for the host-port mappings configured with the same
application protocol, port number, and transport layer protocol.
If two port mappings are configured with the same port number, transport layer protocol, and IP address
or IP address ranges, but with different application protocols, the most recent configuration takes effect.
A mapping with the transport layer protocol specified has a higher priority than one without it.
Examples
# C r e a t e a m a p p i n g of p o r t 3 456 to F T P fo r t h e I P v4 p a c k e t s s en t t o t h e h o s t a t 1.1.1.1 t o 1.1.1.10 .
<Sysname> system-view
[Sysname] port-mapping application ftp port 3456 host ip 1.1.1.1 1.1.1.10
# Create a mapping of port 3456 to FTP for the IPv6 packets sent to 1::1.
<Sysname> system-view
[Sysname] port-mapping application ftp port 3456 host ipv6 1::1
Related commands
display port-mapping user-defined
port-mapping subnet
Use port-mapping subnet to configure a subnet-based host-port mapping.
Use undo port-mapping subnet to remove a subnet-based host-port mapping.
Syntax
port-mapping application application-name port port-number [ protocol protocol-name ] subnet { ip
ipv4-address { mask-length | mask } | ipv6 ipv6-address prefix-length } [ vpn-instance
vpn-instance-name ]
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