Allied Telesis AlliedWare Plus Operating System Version 5.4.4C (x310-26FT,x310-26FP,x310-50FT,x310-50FP) - Manual (Page 2202)

Appendix B: Glossary
Software Reference for x310 Series Switches
B.12 AlliedWare Plus TM Operating System - Version 5.4.4C C613-50046-01 REV A
FIB
Forwarding Information Base. The RIB (Routing Information Base) populates the FIB with
the best route to each destination. When your device receives an IP packet, and no filters
are active that would exclude the packet, it uses the FIB to find the most specific route to
the destination. If your device does not find a direct route to the destination, and no
default route exists, it discards the packet and sends an ICMP message to that effect back
to the source.
For more information see “RIB and FIB Routing Tables” on page 28.3 .
Full duplex
When a port is in full duplex mode, the port transmits and receives data simultaneously.
See
Half duplex .
G
Guest VLAN
If 802.1X authentication has been configured on access ports in the network, you might
still want to provide limited network access to those users whose devices do not have
802.1x supplicant enabled, or who have unrecognized authentication credentials. The
mechanism to achieve this is known as a Guest VLAN. The idea is that if the users device
fails 802.1X authentication, or is not even performing any 802.1X authentication, then its
connection port can be put into the guest VLAN.
For more information see “Configuring a Guest VLAN” on page 2 and the auth guest-
vlan command on page 43.8 . For a configuration example see “Configuring a Guest
VLAN” on page 42.2 .
H
Half duplex
When a port is in half duplex mode, the port transmits or receives but not both at the
same time. See
Full duplex .
Hardware ACLs
See ACL types .
I
ICMP
Internet Control Message Protocol. ICMP allows networking devices to send information
and control messages to other devices or hosts.
For more information see “Internet Control Message Protocol (ICMP)” on page 24.9 .