3Com Switch 7750 Configuration Guide Guide

Configuring Internal Channel Monitoring 829
Configuring Internal
Channel Monitoring
Introduction An internal channel refers to the interface channel between the Switch Fabric and
the service cards. The Switch Fabric sends handshake packets to each service card
every second. After receiving the handshake packets, the service cards reports the
result to the Switch Fabric. In this case, the Switch Fabric knows that the service
cards are operating normally. Through this process, the Switch Fabric can judge
whether each service card in the device operates normally.
Switch 7750 Family Ethernet switches support this feature. Through this feature,
you can monitor internal channels.
You can also set the maximum number of times the Switch Fabric fails to receive
handshake packets. If the number of times the Switch Fabric fails to receive
handshake packets exceeds the upper limit, the switch resets the processing chip
automatically. When the Switch Fabric receives handshake packets, it resets the
counter automatically.
You can also set whether to restart the service card or the switch when the
number of times the Switch Fabric fails to receive handshake packets exceeds the
upper limit.
Monitoring Internal
Channel Configuration
Configuring Switch
Chip Auto-reset
Introduction In actual application, a switch may fail to process services normally due to internal
channel block or because the switch chip is busy.
The Switch 7750 Family supports the function of resetting switch chips
automatically. In case that the function of monitoring internal channels is enabled,
when the internal channel handshake between a card and the backplane fails, the
switch resets the switch chip automatically to resume the corresponding card.
When the function of resetting switch chips is disabled, even if the switch finds
that the internal channel handshake fails, it cannot reset the switch chip
automatically.
Table 643 Monitor internal channels
Operation Command Description
Enter system view system-view -
Enable the function of
monitoring internal channels
monitor inner-channel Optional
Configure to restart the
service card
monitor inner-channel
reboot-lpu
Optional
Configure to restart the
switch
monitor inner-channel
reboot-switch
Optional
Set the upper limit for
resetting the chip
monitor inner-channel
upper-limit upper-timers
Optional