Configuring Control Modules and System Timing
Providing a basic system IP configuration
Stinger® FS/Stinger FS+ Getting Started Guide
5-13
64 bytes from 1.1.1.56: icmp_seq=0 ttl=255 time=0 ms
64 bytes from 1.1.1.56: icmp_seq=3 ttl=255 time=0 ms
^C
--- 1.1.1.56: Ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max = 0/0/0 ms
Defining the soft IP interface for fault tolerance
A Stinger unit supports a soft IP interface, for administrative connections, that can be
assigned its own IP address. It can be reached through the administrative Ethernet
interface of whichever control module is the primary control module. Therefore, as
long as one of the unit’s control modules is functioning as the primary control
module for the chassis, the soft interface address is reachable.
When power is applied to the system, the soft IP interface address is not initialized
until a control module assumes the role of primary control for the Stinger unit. The
Ethernet interface of the primary control module can then respond to ARP requests
for the soft IP interface address in addition to requests for its own IP address, which
was previously configured. If the secondary control module becomes primary, the
system reinitializes the soft IP interface address to the Ethernet interface of the new
primary control module.
The soft IP interface is configured in the IP-Interface profile with the zero index.
The following commands set the soft interface IP address to 1.1.1.128/24:
admin>
read
ip-interface {{ 0 0 0 }}
IP-INTERFACE/{ { any-shelf any-slot 0 } 0 } read
admin>
set ip-addr = 1.1.1.128/24
admin>
write
IP-INTERFACE/{ { any-shelf any-slot 0 } 0 } written
Configuring a default route
A default route is a static route that specifies a destination for addresses that are not
on the local network and to which a known route does not exist. The default route is
generally the IP address of an external router that has more route information about
how specific destinations can be reached. When the default route is configured, the
Stinger unit routes all IP packets with unknown destinations to the specified external
router. If no default route is defined, the unit drops IP packets for which it has no
route.
Figure 5-6 shows the Stinger Ethernet interfaces on a subnet, connected to the same
Ethernet segment as a local backbone router. In this network, the Stinger unit can
use the local router as its default route.
