Hitachi GR2000 Series - Manual (Page 196)

Hitachi Gigabit Router GR2000 Series Enhanced Version Operations - Device Management Overview
7-30 GR2K-GA-0015
Ver. 07-02
Priority3 Qlen : 215 Priority4 Qlen : 58
Priority5 Qlen : 66 Priority6 Qlen : 32
Priority7 Qlen : 147 Priority8 Qlen : 178
Priority1 maximum Qlen : 148 Priority2 maximum Qlen : 139
Priority3 maximum Qlen : 227 Priority4 maximum Qlen : 89
Priority5 maximum Qlen : 129 Priority6 maximum Qlen : 78
Priority7 maximum Qlen : 194 Priority8 maximum Qlen : 233
Total out frames : 2784609
Total out bytes : 178214976
Total discarded frames due to queue overflow : 2375
>
Step 3. A packet is discarded by queue control when the total number of discarded
frames (total discarded frames due to queue overflow) is more than one.
In this example, since the total number of discarded frames is 2375, a
packet is discarded by queue control.
7.5.1.9 Inspection of Null Interface Definition Information
When the packet is not discarded although communication to a specific network or
terminal is restricted by the Null interface, the Null interface configuration definition
may be incorrect. Ensure that the Null interface is correctly set up, in accordance
with the following procedure:
Step 1. Using the show interface ipv4-unicast command, ensure that the Null
interface status is “up.”
Step 2. Ensure that the Null interface is correctly defined to the current
configuration information.
Step 3. Use the show ip route command to inspect the route information that this
device has obtained. Ensure that the static route information has been
correctly defined.
Step 4. Using the show ip interface command, ensure that the packet is discarded on
the Null interface.
7.5.1.10 Inspection of Policy Routing Definition Information
When communication is disabled despite no physical failure in this router and the
correct route information, there is a possibility that a failure on the policy routing
output interface is causing packets to be discarded.
To check for such a possibility, follow the procedure below:
Confirm the status of the Null interface by executing the
show ip interface ipv4-unicast command.
Confirm whether the setting is correct in the Null interface of the
operating configuration defining information.
Confirm the route information by executing
the show ip route command.
Confirm that the packet has been discarded on the Null interface
by executing the show ip interface command.