Appendix A. Glossary - IBM RackSwitch G8000 Application Manual

Appendix A. Glossary

CNA Converged Network Adapter. A device used for I/O consolidation such as that in
Converged Enhanced Ethernet (CEE) environments implementing Fibre Channel over
Ethernet (FCoE). The CNA performs the duties of both a Network Interface Card (NIC)
for Local Area Networks (LANs) and a Host Bus Adapter (HBA) for Storage Area
Networks (SANs).
The destination IP address of a frame.
DIP
The destination port (application socket: for example, http-80/https-443/DNS-53)
Dport
Host Bus Adapter. An adapter or card that interfaces with device drivers in the host
HBA
operating system and the storage target in a Storage Area Network (SAN). It is
equivalent to a Network Interface Controller (NIC) from a Local Area Network (LAN).
Network Address Translation. Any time an IP address is changed from one source IP or
NAT
destination IP address to another address, network address translation can be said to
have taken place. In general, half NAT is when the destination IP or source IP address
is changed from one address to another. Full NAT is when both addresses are changed
from one address to another. No NAT is when neither source nor destination IP
addresses are translated.
Preemption In VRRP, preemption will cause a Virtual Router that has a lower priority to go into
backup if a peer Virtual Router starts advertising with a higher priority.
Priority In VRRP, the value given to a Virtual Router to determine its ranking with its peer(s).
Minimum value is 1 and maximum value is 254. Default is 100. A higher number will win
out for master designation.
The protocol of a frame. Can be any value represented by a 8-bit value in the IP header
Proto (Protocol)
adherent to the IP specification (for example, TCP, UDP, OSPF, ICMP, and so on.)
The source IP address of a frame.
SIP
The source port (application socket: for example, HTTP-80/HTTPS-443/DNS-53).
SPort
In VRRP, a method to increase the priority of a virtual router and thus master
Tracking
designation (with preemption enabled). Tracking can be very valuable in an
active/active configuration.
You can track the following:
• Active IP interfaces on the Web switch (increments priority by 2 for each)
• Active ports on the same VLAN (increments priority by 2 for each)
• Number of virtual routers in master mode on the switch
Virtual Interface Router. A VRRP address is an IP interface address shared between
VIR
two or more virtual routers.
A shared address between two devices utilizing VRRP, as defined in RFC 2338. One
Virtual Router
virtual router is associated with an IP interface. This is one of the IP interfaces that the
switch is assigned. All IP interfaces on the G8000s must be in a VLAN. If there is more
than one VLAN defined on the Web switch, then the VRRP broadcasts will only be sent
out on the VLAN of which the associated IP interface is a member.
© Copyright IBM Corp. 2011
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