INE R&S ATC039 - Enhanced Object Tracking, IP SLA, Reliable Static Routing

Enhanced Object Tracking

• What if line protocol up status does not indicate reachability?
– NBMA interfaces, Metro Ethernet, etc.

• EOT adds more reliable tracking such as
– Route entry, route metric, IP SLA, EEM, etc.
• EOT can integrate with
– Static routing, policy routing, FHRPs, etc.
• Configuration
– track [number] [interface | ip | list | …]

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Cisco IOS Software Releases 12.4 T - Configuration Guides - IP
IP Application Services Configuration Guide, Cisco IOS Release 12.4T
Configuring Enhanced Object Tracking
http://www.cisco.com/en/US/docs/ios-xml/ios/ipapp/configuration/12-4t/iap-eot.html

Cisco IOS Software Releases 12.4 T - Configuration Guides - IP
First Hop Redundancy Protocols Configuration Guide, Cisco IOS Release 12.4T
http://www.cisco.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/12-4t/fhp-12-4t-book.html

Cisco IOS Software Releases 12.4 T - Configuration Guides - Network Management
IP SLAs Configuration Guide, Cisco IOS Release 12.4T
http://www.cisco.com/en/US/docs/ios-xml/ios/ipsla/configuration/12-4t/sla-12-4t-book.html

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設定範例:

ip sla 1
  icmp-echo 155.10.0.4 source-ip 155.10.0.5
  frequency 5
  timeout 2000

ip sla schedule 1 start-time now life forever

track 2 ip sla 1 state

ip route 0.0.0.0 0.0.0.0 155.10.0.4 10 track 2

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show ip sla statistics 1
看 return code: OK

show track 2
看 State is UP

debug track

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