IP SLA

  • Can be used by various
    • PBR
    • Static route
    • HSRP
  • Feature to monitor destination
    • Cpu creates data to monitor
    • Operations
      • ICMP, RTP, TCP, UDP, DNS, DHCP, HTTP, FTP
    • Different operations can be monitored at the same time
  • The receiver can be a router or host
    • Might be configured as a SLA Responder

R4(config)#ip sla 2
R4(config-ip-sla)#?
IP SLAs entry configuration commands:
  dhcp         DHCP Operation
  dlsw         DLSW Operation
  dns          DNS Query Operation
  exit         Exit Operation Configuration
  frame-relay  Frame-relay Operation
  ftp          FTP Operation
  http         HTTP Operation
  icmp-echo    ICMP Echo Operation
  icmp-jitter  ICMP Jitter Operation
  mpls         MPLS Operation
  path-echo    Path Discovered ICMP Echo Operation
  path-jitter  Path Discovered ICMP Jitter Operation
  slm          SLM Operation
  tcp-connect  TCP Connect Operation
  udp-echo     UDP Echo Operation
  udp-jitter   UDP Jitter Operation
  voip         Voice Over IP Operation

- snip -
ip sla 1
 icmp-echo 10.10.10.1 source-ip 30.30.30.1
 frequency 10
ip sla schedule 1 start-time now recurring
- snip -

R4#sh ip sla statistics

Round Trip Time (RTT) for       Index 1
        Latest RTT: 52 milliseconds
Latest operation start time: *00:05:36.363 UTC Fri Mar 1 2002
Latest operation return code: OK
Number of successes: 12
Number of failures: 9
Operation time to live: 3395 sec

Enhanced Object Tracking

  • track object 1 ip sla 1 (delay)
  • ip route 10.10.10.0 255.255.255.0 fastEthernet0/0 track 1
  • PBR:
    • route-map:
      • set ip nexthop verify-availability next-hop-ip seq-number track track-number

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