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System Diagnostics
4 - 3
To view the networking configuration and status of the 4300T proceed to the
Network Information page as follows:
1. Select System.
2. Select System Overview.
3. Select Network Information.
The following networking information is displayed:
Routing Information
The system routing table contains the static routes for hosts and networks that
are configured on the 4300T. If just the LAN and WAN IP addresses have been
configured there will be four lines displayed:
• The private subnet will be associated with the LAN interface.
• A public subnet present for the WAN interface.
• An entry for the 4300T loopback interface
• The 4300T’s default gateway forwarding to the WAN interface
Additional lines may be displayed depending on the contents of the Route and
VoIP Subnet Routing pages. Each of the entries on these pages will cause an
additional entry in the routing table.
Link Status
Link Status displays the status of the ethernet interfaces. Ethernet
autonegotiation is often unreliable, especially between different vendors or
old and new networking equipment. Failure of autonegotiation is generally
not a cause for concern. However, if the negotiated rates change intermittently
or the link is reported as down or no link, the link rate may need to be set
manually on the Set Link Rate page. Intermittent data and voice outages may
be caused by link flapping when the two endpoints of the Ethernet cable
cannot reach agreement using autonegotiation". If the link rate is set
manually, ensure that the device at the far end of the connection can
communicate at the desired rate. Incompatible rates can cause a loss of
communication with the 4300T.
Link status for the Ethernet ports is displayed via the LEDs adjacent to each
physical port.
Interface Information
The specific status and configuration information for the system interfaces is
displayed in the Interface Information section. HDLC0 shows the interface
statistics for the T1/E1 WAN link. ETH0 shows the interface statistics for the
internal LAN interface between the 4300T processor and the built-in LAN
switch. Interface statistics for the external LAN ports are not displayed.