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Monitoring Hub Performance 2-19
Using the SEHI Hub View
counted as CRC errors had only CRC errors — they were of legal size (not runts or
giants) and had no truncated bytes. You also know that any packet less than 64
bytes long has been counted as a runt, even if it also had alignment and/or CRC
problems (which is likely if the runt is the result of a collision or other
transmission problem).
Protocols/Frames Statistics
The Protocols/Frames statistics windows display the following fields:
Protocols
• OSI Frames
• Novell Frames
• Banyan Frames
• DECNet Frames
• XNS (Xerox Network Systems) Frames
• IP Frames
• Ctron Frames
• AppleTalk Frames
• Other Frames
Frame Sizes
• Runt Frames (packets smaller than 64 bytes)
• 64-127 (byte) Frames
• 128-255 Frames
• 256-511 Frames
• 512-1023 Frames
• 1024-1518 Frames
• Giant Frames (packets larger than 1518 bytes)
Viewing the Port Source Address List
You can use the Source Address List option from the Port menu to view the Port
Source Address List (Figure 2-11). The Port Source Address List contains the MAC
address and its associated vendor name for each device communicating through a
specific port on the SEHI or hubstack.
The full features of Source Addressing (including the device-level Source Address
List, port locking, source address traps, and find source address) are discussed in
the Source Address chapter, later in this book.
NOTE
Because the SEHI does not currently support Protocol counts, the Protocol fields in the
Protocols/Frames window will remain blank.