Functional Failure Analysis Overview - NEC IP8800/S2400 Series Troubleshooting Manual

1.3

Functional Failure Analysis Overview

The overview of functional failure analysis for this system is shown in the table below.
Some communication failure in the lower layer may cause the communication failure in the upper layer, check the
items in the lower layer as well.
Table 1-3: Functional Failure Status and Reference
Item
Forgot login password
Problems on MC
Problems on operation terminal
Network interface communication
failure
Layer 2 network communication
failure
IPv4 network communication
failure
Subitem
Forgot login user password
Forgot system administrator password
"MC:--------" is displayed
"MC not found." is displayed
Console input/display disabled
Remote login disabled
Login authentication disabled
Command acceptance disabled
Ethernet port communication failure
BSU communication failure
[IP8800/S6700]
10BASE-T/100BASE-TX/1000BASE-T
communication failure
1000BASE-X communication failure
10GBASE-R communication failure
Communication failure while PoE is
functioning
Link aggregation failure
VLAN failure
Spanning tree failure
Ring Protocol failure
IGMP snooping disabled
MLD snooping disabled
Communication disabled
DHCP disabled
Dynamic DNS disabled
Reference
3.1.1 Forgot the Login User Password
3.1.2 Forgot the System Administrator Password
3.2.1 "MC:--------" is displayed by entering the show
system command or the show mc command
3.2.2 "MC not found" is displayed when MC is
accessed
3.3.1 Unable to Input/Display from the Console
Correctly
3.3.2 Login from the Remote Operation Terminal Is
Failed
3.3.4 Command Authorization Using RADIUS/
TACACS+ Is Disabled
3.3.4 Command Authorization Using RADIUS/
TACACS+ Is Disabled
3.4.1 Ethernet Port Cannot Be Connected
3.4.2 Communication Failure in Basic Switching Unit
BSU/PSP [IP8800/S6700]
3.4.3 Actions against Troubles on 10BASE-T/
100BASE-TX/1000BASE-T
3.4.4 Actions against Troubles on 1000BASE-X
3.4.5 Actions against Troubles on 10GBASE-R
3.4.6 Communication Failure on Using PoE
3.4.7 Communication Failure on Using Link
Aggregation
3.5.1 Layer 2 Communication by VLAN Is Disabled
3.5.2 Failures on Using Spanning Tree
3.5.3 Failures on Using Ring Protocol
3.5.4 Multicast Relay by IGMP snooping Is Disabled
3.5.5 Multicast Relay by MLD snooping Is Disabled
3.6.1 Communication Is Disabled or Is Disconnected
3.6.2 IP Addresses Cannot Be Assigned Using DHCP
Function
3.6.3 DynamicDNS Cooperation in DHCP Function Is
Disabled
1.
Overview
7