Verilink 9000 Series (34-00271) Product Manual - Manual (Page 286)

264 C HAPTER 15: IP L AYER A PPLICATION
Router IP address
The router IP address is used to send the ARP request to the router to obtain its
hardware address. Even if the datagram sent to another network is sent to the
router, the IP header contains the IP address of the final destination in the
destination field. The MAC header contains the hardware address of the router that
was previously obtained from the ARP response. The NETID portion of the router
address must be the same as our NETID for the router to be considered. The
selections for this field range from 0.0.0.0 to 255.255.255.255.
LAN Media Access Control
The LAN MAC parameter specifies if the IP frame is encapsulated in either an
Ethernet or 802.2 header. The Ethernet header contains the MAC destination and
source addresses and a frame type while the 802.2 header contains the 802.3
header (MAC destination and source addresses plus frame length), a LLC1 header
(DSAP, SSAP and frame type = UI) and a SNAP header containing SNAP802.2ID,
SNAP802.2ID, SNAP802.2 ID plus the Ethertype. Most applications using IP
protocol use the ETHERNET MAC. The selections for this field are ETHER or
802.2.
Preference level
Through the list of routers, preferences can be configured for utilizing the router.
The one with the higher preference level is always used for datagrams destined for
other networks. If only a router is defined, this parameter is irrelevant. The
selections for this field range from a decimal 0 to 65535.