Troubleshooting guide

1. Overview
11
Spanning tree failure 3.6.2 Failures occurring when the Spanning
Tree functionality is used
Ring Protocol failure 3.6.3 Failures occurring when the Ring
Protocol functionality is used
IGMP snooping not possible 3.6.4 Multicast forwarding by IGMP snooping
is not possible
MLD snooping not possible 3.6.5 Multicast forwarding by MLD snooping is
not possible
IPv4 network communication
failures
Communication not possible 3.7.1 Communication is not possible or is
disconnected
DHCP not functioning properly 3.7.2 IP addresses cannot be assigned by the
DHCP functionality
Dynamic DNS not functioning
properly
3.7.3 Dynamic DNS link does not work in the
DHCP functionality
IPv4 unicast routing
communication failures
No RIP information 3.8.1 No RIP routing information exists
No OSPF information 3.8.2 No OSPF routing information exists
No BGP4 information 3.8.3 No BGP4 routing information exists
No VRF information 3.8.4 IPv4 routing information cannot be found
in VRF
Communication failures in the
IPv4 multicast routing
functionality
Communication not possible in the
PIM-SM network
3.9.1 Communication is not possible on the
IPv4 PIM-SM networks
Data is forwarded twice in a PIM-SM
network
3.9.2 Multicast data is forwarded twice in the
IPv4 PIM-SM network
Communication not possible in a
PIM-SSM network
3.9.3 Communication is not possible on the
IPv4 PIM-SSM networks
Data is forwarded twice in a
PIM-SSM network
3.9.4 Multicast data is forwarded twice in the
IPv4 PIM-SSM network
VRF communication problem 3.9.5 IPv4 multicast communication problems
in VRF
Extranet communication problem 3.9.6 Problems that occur during IPv4
multicast communication in the extranet
Communication not possible in the
PIM-DM network
3.9.7 Communication is not possible on the
IPv4 PIM-DM networks
Data is forwarded twice in the
PIM-DM network
3.9.8 Multicast data is forwarded twice in the
IPv4 PIM-DM network
IPv6 network communication
failures
Communication not possible 3.10.1 Communication is not possible or is
disconnected
DHCP relay problems 3.10.2 IPv6 DHCP relay communication
problems
DHCP server problems 3.10.3 Troubleshooting IPv6 DHCP server
problems
IPv6 unicast routing
communication failures
No RIPng information 3.11.1 RIPng routing information cannot be
found
Category Sub-category Reference