Toubleshooting flow chart to use during unicast troubleshooting.
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Route programming in software and hardware
Show ip route (In software)
Show mls cef exact route (In hardware)
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ARP programming in software and hardware
Show ip arp (In software for next hop -address given in show ip route)
Show mls cef adjacency (In hardware for next-hop address given in show ip route)
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Mac programming in software and hardware
Show mac-address address <> (mac address given in show ip arp for next-hop address )
remote command switch Show mac-address address <> (mac address given in show ip arp for next-hop address )
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Spanning tree programming in software and hardware
Show spanning-tree vlan <> (In software)
remote command switch show table (In hardware)
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Default acl programming in hardware
Show tcam interface gigabitEthernet <> acl in ip detail all1
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LTL (interface) programming in hardware
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Error counters on the interfaces involved
Show interface gigbitethernet <> counters (In software)
Show interface gigbitethernet <> counters error (In software)
Show counters interface gigabitethernet <> (In software)
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Error register dump of the ASIC's involved in the path from CPU to interface
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Packet captures (ELAM)
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End
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