Version 6.6 839 October 2014
Installation & Operation Manual 47. Troubleshooting Strategy
Problem Possible Cause(s) Actions to Take See:
Media Gateway
software is not
running on both SC
boards
Start the Media Gateway software
on both SC boards by rebooting
them.
'Working with
System
Controller
Boards' on page
223
External firewall
blocks
communication with
the Mediant 8000.
Verify that the SNMP
communication with the Media
Gateway is not blocked by a firewall
or other 3
rd
party network
equipment.
'Network
Services on SC
Boards' on page
357
No communication
with the Media
Gateway
(ping to the SC's
Global IP is
unstable;
occasionally does
not succeed)
Wrong external IP
network configuration
The Mediant 8000 must be
connected to two external Layer 3
switches or routers, that must be
configured for fully redundant
operation via the use of
VRRP/HSRP protocols. Improper
configuration of external switches
may lead to ustable IP network
connectivity.
Make sure that the external
switches/routers have the “spanning
tree” feature enabled.
'External Layer 3
Ethernet
Switches or
Routers' in
Section
'Connecting the
Mediant 8000 to
the IP Network'
on page 217
No communication
with the Media
Gateway
(after ES board
failure/switchover,
there is no ping to
SC's Global IP).
Two external Layer 3
switches or routers,
to which the Mediant
8000 is connected,
are not properly
configured for
redundant operation.
The Mediant 8000 must be
connected to two external Layer 3
switches or routers, which must be
configured for fully redundant
operation via the use of
VRRP/HSRP protocols. Improper
configuration of external switches
may lead to connectivity loss in
case of ES board switchover.
External Layer 3
Ethernet
Switches or
Routers in
Section
'Connecting the
Mediant 8000 to
the IP Network'
on page 217.
Problems with ES boards
ES board is
Disabled (colored
red in the EMS)
Ethernet Switch
board is completing
the Unlock action
It may take up to 10 minutes for the
ES board to complete the reboot
that accompanies the Unlock action.
Wait patiently.
Note: while one ES board reboots,
another ES board takes activity and
provides IP connectivity to the rest
of the boards in the chassis.
'Working with the
ES boards' on
page 261
Ethernet Switch
board malfunctions
Try to repeat lock/unlock action on
the ES board.
'Working with the
ES boards' on
page 261
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