Guralp Systems CMG-DCM build <10,000 User Manual
Page 59
Operator's Guide
temporarily be replaced by a PC) the PC can be used to investigate the
link properties and the correct value can be obtained.
For more information, please see
Note that, if testing from a PC running Windows, the MTU of the
Windows PC should be set to 1500 before starting the test.
The Extra dhcpcd arguments field can be used to change the operation
of the DHCP client. Please see
for information about what options can be added here.
The Extra ip addr arguments field can be used to tune the operation of
the network interface. A non-standard broadcast address can be
specified by entering broadcast broadcast_address. For other
settings that can be used here, please see
The Nameserver field should be used to specify the IP address of the
DNS server for your network. This field must be set correctly before
internet firmware upgrades can be used. A secondary DNS server's
address can be added in the Backup nameserver field.
The Default route (gateway) field should be populated with the IP
address of the gateway router, for access to other networks or to the
Internet. This field must be set correctly before internet firmware
upgrades can be used.
The ip route arguments field can be used to modify the invocation of
the ip route add command in order to, e.g., set the route metric.
The options that can be set here are mostly highly technical and
should rarely be required. Please see
for
more information.
Two tables appear at the the bottom of the form when in expert mode:
the IP aliasing table and the Extra routes table. These are shown in the
screen-shot below.
The IP aliasing table is used to add extra addresses to this interface, a
practice known as multi-homing. By default, the table displays three
blank rows but, should you need more, complete the first three and
submit the form: it will be redrawn with extra blank rows. The
columns in the table are:
•
IP and CIDR: The address should be entered in CIDR format,
where the address is followed by a slash and then the number
of bits defining the netmask, e.g. 192.168.0.1/24 for IPV4
or 2001:db8::/32 for IPV6.
November 2010
59