BLADE OS™ Application Guide HP GbE2c Ethernet Blade Switch for c-Class BladeSystem Version 5.1 Advanced Functionality Software

BMD00113, September 2009 261
Glossary
DIP (Destination IP
Address)
The destination IP address of a frame.
Dport (Destination
Port)
The destination port (application socket: for example, http-80/https-443/DNS-53)
NAT (Network
Address Translation)
Any time an IP address is changed from one source IP or 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 should a peer Virtual Router start 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.
Proto (Protocol)
The protocol of a frame. Can be any value represented by a 8-bit value in the IP
header adherent to the IP specification (for example, TCP, UDP, OSPF, ICMP,
and so on.)
SIP (Source IP
Address)
The source IP address of a frame.
SPort (Source Port)
The source port (application socket: for example,
HTTP-80/HTTPS-443/DNS-53).
Tracking
In VRRP, a method to increase the priority of a virtual router and thus master
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