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Syntax 
userlog flow export [ vpn-instance vpn-instance-name ] host { hostname | ipv4-address | ipv6 
ipv6-address } port udp-port 
undo userlog flow export [ vpn-instance vpn-instance-name ] host { hostname | ipv4-address | 
ipv6 ipv6-address } 
Default 
No log hosts are specified. 
Views 
System view 
Predefined user roles 
network-admin 
Parameters 
vpn-instance  vpn-instance-name:  Specifies  an  MPLS L3VPN instance by its name,  a 
case-sensitive string of 1 to 31 characters. If the log host is on the public network, do not specify this 
option. 
hostname: Specifies a log host by its name, a case-insensitive string of 1 to 253 characters. The host 
name can contain letters, digits, and special characters including hyphen (-), underscore (_), and dot 
(.). 
ipv4-address: Specifies a log host by its IPv4 address. The address must be a valid unicast address 
and cannot be a loopback address. 
ipv6 ipv6-address: Specifies a log host by its IPv6 address.  
port udp-port: Specifies the UDP port number of the log host, in the range of 1 to 65535. As a best 
practice, use UDP port numbers in the range 1025 to 65535 to avoid collision with well-known UDP 
port numbers. 
Examples 
# Export flow log entries to UDP port 2000 on the log host at 1.2.3.6. 
<Sysname> system-view 
[Sysname] userlog flow export host 1.2.3.6 port 2000 
Related commands 
display userlog export 
userlog flow export load-balancing 
Use userlog flow export load-balancing to enable load balancing for flow log entries. 
Use undo userlog flow export load-balancing to restore the default. 
Syntax 
userlog flow export load-balancing 
undo userlog flow export load-balancing 
Default 
Load balancing is disabled. The device sends a copy of each flow log entry to all available log hosts. 
Views 
System view