Zhone Technologies 600 - Manual (Page 210)

8-2 Server Cards
Model No. Running Head IPR Card Descriptions IPR Card
The IPR will automatically determine when to Bridge packets and when to route them, based
on the MAC destination address in the Ethernet header.
IPR will forward packets matching an entry in the addresses table, configured manually by the
user. In addition, LAN broadcasts will be forwarded on all bridge PVCs. No spanning tree or
learning algorithms is supported.
IPR will forward Ethernet and 802.3 packets regardless of the upper level protocol: IP
DECnet, SNA, AppleTalk, etc. Bridging function is completely “transparent” at IP level, there
is no changes to IP address or any other information in the IP header. When accessing the IPR
itself, packets will be exchanged in the format as specified in the “encapsulation” setting for
the Ethernet port.
The WAN interface is standard encapsulation of Ethernet/802.3 over Frame Relay (RFC
1490).
IPR will provide the capability to deliver IP packets to the CPU hosting the IPR. Assuming an
average frame of 256 bytes, IPR maintains LAN to WAN (and WAN to LAN) throughput of
2.048 Mbps.
8.2.1.1 Card Jumpers/Switch Settings
The IPR card does not have any jumpers or switches on its motherboard.
8.2.2 Installing the IPR Cards
Insert the IPR 10B2 or IPR 10BT card into one of the server card chassis slots (P1 to P3). The
system can accommodate up to three server cards.