E24254-01
Appendix G TCP/IP Connectivity 201
TCP/IP Connectivity
■
Potential Problems
While the SL8500’s processor can auto-negotiate between 10 and 100 Mbps
traffic, floods of address resolution protocol broadcasts (ARP is a network
layer protocol that converts IP addresses into physical addresses) can
overwhelm the library.
If the SL8500 is connected to shared networks, broadcast messages may be
sent to all network nodes. While the library is receiving these irrelevant
broadcasts, it cannot receive or reply to requests for library activity to the point
that, to its host, it appears that the library’s TCP/IP connection has been lost.
Similarly, heavy network traffic can overwhelm the Ethernet controller on the
HBC card.
Shared Networks
The following are some examples of issues that can arise when you connect
the SL8500 library to a shared network.
•
A TCP/IP-connected library can handle standard host traffic, but it cannot
handle floods of
Address Resolution Protocol
(ARP) broadcasts.
For this
reason, it is best to attach the library on a controlled network, such
as behind a switch or router.
•
Newer generation networks, such as 1000Base-T and Gig-E, support
earlier communication modes—such as 10BaseT and 100BaseT.
However, devices that are communicating with the library may transmit
data at bandwidths that could overwhelm it. Again, for this reason, is best
to
attach the library on a controlled network
, such as, with a switch that
can isolate the library from network broadcasts.
•
When you connect the library on shared networks, and broadcasts are
sent to all network nodes, they may also be directed to the library (even
though it does not need them). During the time the library is receiving
these irrelevant broadcasts, it cannot receive requests or reply to others in
a timely fashion. This heavy broadcast traffic on the network can saturate
the library to the point that, to the host, it may appear that the TCP/IP
connection has been lost.
•
Heavy network traffic can also overwhelm the Ethernet controller causing
the processor to continuously reset and re-initialize the controller, then
recover the host-to-library communications.
Summary of Contents for StorageTek StreamLine SL8500
Page 4: ...Summary of Changes iv SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 12: ...Contents xii SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 18: ...Tables xviii SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 76: ...Introduction 56 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 97: ...E24254 01 Chapter 3 Site Survey Forms 77 Site Survey Forms Figure 21 Content Management Plan ...
Page 137: ...E24254 01 Chapter 4 Site Preparation 117 Site Preparation ...
Page 138: ...Site Preparation 118 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 198: ...Electrical Conversions 176 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 206: ...Comparisons 184 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 233: ...E24254 01 Appendix H Partitioning 211 Partitioning Make copies as necessary ...
Page 240: ...Partitioning 218 SL8500 Systems Assurance Guide July 2011 E24254 01 ...
Page 251: ...E24254 01 Appendix J Work Sheets 229 Work Sheets Figure 73 Content Management Work Sheet ...
Page 276: ...Index 254 SL8500 Systems Assurance Guide June 2011 E24254 01 ...
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