Verilink 9000 Series (34-00271) Product Manual - Manual (Page 283)

Configuration / Operation 261
All systems multicast address
The All systems multicast IP address is used by the IP Layer to intercept ICMP
router advertisement messages (according to RFC 1256) between routers on the
network to create a dynamic routers list for access outside the local network. The
selections for this field range from 224.0.0.0 to 239.255.255.255.
ICMP router solicitation address
The ICMP router address is used by the IP Layer to mutlicast an ICMP router
solicitation message to the routers on the network to obtain a list of available
routers (according to RFC 1256). The selections for this field range from 224.0.0.0
to 239.255.255.255.
IP broadcast address
This address is used for router solicitation request if it is not defined. A broadcast
address is defined as an address with the HOSTID with all bits to 1. Then it
depends on the NETID. The selections for this field range from 0.0.0.0 to
255.255.255.255.
Maximum Transfer Unit
The Maximum Transfer Unit (MTU) represents the largest datagram that the IP
Layer can transmit on the link. This value should be in accordance with the
underlying technology. For example, with Ethernet, the frame size is limited to
1500 bytes. So, the MTU should not exceed 1500 bytes. Also, some routers along
the path followed by datagrams can have a smaller limitation in the datagram's
size. The default value is a safe value since it is mandatory for an IP router to
accept datagrams of 576 bytes. The maximum MTU for an Ethernet LAN is 1500
and 802.3 for 1492. The selections for this field range from a decimal 0 to 65535,
576.
ICMP request retry
The ICMP request retry is used as a counter for request retry until a failure is
declared. For example, for subnet mask request, the IP Layer retries as many times
as it is configured before using the default value for the mask. The selections for
this field range from a decimal 1 to 255, 3.
ARP request retry
The ARP request retry is used by IP as a retry counter for sending ARP requests.
After the number of attempts configured, the destination is considered unreachable.
The selections for this field range from a decimal 1 to 255, 3.
ARP aging timer
Each entry in the ARP table is maintained for a certain period. After a timeout,
another ARP request is sent to verify the validity of the entry. A value of zero
makes the entries permanent. The selections for this field range from a decimal 0
to 65535, 300.