Cisco Presentation Guide

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Ethernet Statistics Statistics Terminology (1) • Collision - simultaneous imultaneous transmission occurring before slot time (64/512B) has elapsed • Late collision - simultaneous imultaneous transmission occurring after slot time has elapsed • NIC does not retransmit the frame (!) • Jabber, abber, long frame, frame, range errors - excessively xcessively or illegally long transmission • Short hort frame, collision fragment, fragment, runt - illegally llegally short transmission • collision fragment - partial frames < 64B 64B with invalid CRC •typically typically result of remote collision • if signal it does not exhibit the local collision symptoms symptom • runt =
Ethernet statistics terminology (2) •Alignment Alignment error - Insufficient or excessive number of bits transmitted •Out Out of range error - illegal Length value (too large) •Range Range error - actual ctual and reported (Length field) number of octets in frame do not match •too too small Length value or Length does not match the actual number of octets received •Ghost Ghost or jabber - Unusually long Preamble or Jam signal •Ghost: Ghost: noise >72B, without valid SFD •Jabber: Jabber: >20000 bit times © 2005 Petr Grygarek, Advanced Computer Networks Technologies 49
Page 1 and 2: Ethernet Petr Grygárek Gryg rek ©
Page 3 and 4: Ethernet Naming Rules (IEEE Standar
Page 5 and 6: Historical Ethernet Implementations
Page 7 and 8: 10Base5 Capabilities •Bus Bus (co
Page 9 and 10: 10BaseT •Star Star (tree) topolog
Page 11 and 12: Physical Layer of Fast Ethernet •
Page 13 and 14: Ethernet Today •Ethernet Ethernet
Page 15 and 16: Physical Layer of the Gigabit • 1
Page 17 and 18: 1000BaseT (802.3ab) • uses TP Cat
Page 19 and 20: Ethernet Advantages •Simplicity S
Page 21 and 22: Ethernet Frame •Preamble: Preambl
Page 23 and 24: Timing •Propagation Propagation d
Page 25 and 26: Collisions •When hen a transmitti
Page 27 and 28: •Local Local collision Collision
Page 29 and 30: Bit Synchronization •10Mbps: 10Mb
Page 31 and 32: 100BaseT2, 100BaseT4 (1) •Propose
Page 33 and 34: Ethernet Capability Autonegotiation
Page 35 and 36: FLP Bursts •data data pulses inte
Page 37 and 38: Negotiated capabilities •speed sp
Page 39 and 40: Capability negotiation process (2)
Page 41 and 42: Modern Ethernet Technologies © 200
Page 43 and 44: 10GE on Fiber (10GBase-R) 802.3ae
Page 45 and 46: Ethernet WAN PHYs (10GBASE-W) 10GBA
Page 47: Additional Information © 2005 Petr
Page 51: Useful Ethernet information •http

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