Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 778)

748 Multi-Service IronWare Switching Configuration Guide
53-1003036-02
Configuring an interface as the source for Syslog packets
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Identifying a single source IP address for Telnet, SSH, NTP, TFTP, TACACS/TACACS+, or RADIUS
packets provides the following benefits:
• If your Telnet, SSH, NTP, TFTP, TACACS/TACACS+, or RADIUS server is configured to accept
packets only from specific IP addresses, you can use this feature to simplify configuration of
the server by configuring the device to always send the packets from the same link or source
address.
• If you specify a loopback interface as the single source for Telnet, SSH, NTP, TFTP,
TACACS/TACACS+, or RADIUS packets, servers can receive the packets regardless of the states
of individual links. Thus, if a link to the server becomes unavailable but the client or server can
be reached through another link, the client or server still receives the packets, and the packets
still have the source IP address of the loopback interface.
The software contains separate CLI commands for specifying the source interface for Telnet, SSH,
NTP, TFTP, TACACS/TACACS+, or RADIUS packets. You can configure a source interface for one or
more of these types of packets separately.
Configuring an interface as the source for Syslog packets
You can configure the device to use the lowest-numbered IP or IPv6 address configured on a
loopback interface, virtual interface, or Ethernet port as the source for all Syslog packets from the
device. The software uses the lowest-numbered IP or IPv6 address configured on the interface as
the source IP address for the packets.
For example, to specify the lowest-numbered IP address configured on a virtual interface as the
device's source for all Syslog packets, enter commands such as the following.
Brocade(config)# int ve 1
Brocade(config-vif-1)# ip address 10.0.0.4/24
Brocade(config-vif-1)# exit
Brocade(config)# ip syslog source-interface ve 1
The commands in this example configure virtual interface 1, assign IP address 10.0.0.4/24 to the
interface, then designate the interface's address as the source address for all Syslog packets.
Syntax: [no] ip syslog source-interface ethernet [slotnum/]portnum | loopback num | ve num
The num parameter is a loopback interface or virtual interface number. If you specify an Ethernet,
the slotnum/]portnum is the port’s number including the slot number, if you are configuring a
device.
The default is the lowest-numbered IP or IPv6 address configured on the port through which the
packet is sent. The address therefore changes, by default, depending on the port.
With this new command, the source ip of syslog is no longer controlled by the snmp-server
trap-source command.
Configuring ARP parameters
Address Resolution Protocol (ARP) is a standard IP protocol that enables the Brocade device to
obtain the MAC address of another device’s interface when the Brocade device knows the IP
address of the interface. ARP is enabled by default and cannot be disabled.