I

  ip cache-ager  

Platform: IOS based10.3(8) and later and 11.0(3) and later Where: Configuration
Info: Configures the ager of the fast switching cache. The cache-ager is hidden, and you must configure " service internal " to bring it into existence.

• <secs-between-runs> is 02147483, the number of seconds between ager runs. The default is 60 seconds. If the period between ager invalidation runs is set to 0, the ager process is disabled entirely.
  <fraction- low-memory > is 250 1/ <fraction-low-memory> of cache to age per run (low memory). The default is 4.
  <fraction> is 3100 1/ <fraction> of cache to age per run (normal). The default is 20.

Aaron Leonard ( [e-mail] ) recommended 20 3 3 on cisco-nas in light of recent CodeRed attacksthat is, make the ager more aggressive to prevent excessive cache growth.

  ip cef accounting per-prefix non-recursive prefix-length if-con < >  

Platform: IOS based
Where: Configuration
Info: Attach to a VIP console; if-quit (gets out of if-con mode).

  [no] ip gratuitous-arps  

Platform: IOS based
Where: Configuration
Info: Disables unsolicited ARP replies that are useful to signal to a second (redundant) router on the same LAN segment that a remote gateway is present or has changed.

  ip local-pool  

Platform: IOS based
Where: Configuration
Info: Legacy form of ip local pool , for backward compatibility.

  ip ospf interface-retry [x]  

Platform: IOS based
Where: Configuration
Info: Retry for OSPF process.

  ip route profile  

Platform: IOS based
Where: Configuration
Info: This configuration command turns on IP routing table statistics collection. Information such as number of changes and number of prefixes added will be collected.

  ip spd  

Platform: IOS based
Where: Configuration
Info: Selective Packet Discard (SPD) is a mechanism to manage the process level input queues on the Route Processor (RP). The goal of SPD is to provide priority to routing protocol packets and other important traffic control Layer 2 keepalives during periods of process level queue congestion.

  ip spd mode aggressive  

Platform: IOS based
Where: Configuration
Info: SPD can be configured for two different modes: normal (default) and aggressive. The only difference between the two is how the router accounts for invalid IP packets (invalid checksum, incorrect version, incorrect header length, incorrect packet length). Malformed IP packets are dropped by SPD when we are in aggessive mode and in the random drop state. Aggressive mode can be configured using the ip spd mode aggressive command.

  ip spd queue  

Platform: IOS based
Where: Configuration
Info: Queue management functions of SDP.

  ip spd queue max-threshold  

Platform: IOS based
Where: Configuration
Info: Sets maximum queue threshold.

  ip spd queue min-threshold  

Platform: IOS based
Where: Configuration
Info: Sets minimum queue threshold.

  ip tftp boot-interface  

Platform: IOS based
Where: Configuration
Info: Tells the router in what interface to find its image in case it wants to boot from the network via TFTP.

  ip tmstats bin internal  external  

Platform: IOS based
Where: Configuration
Info: Configuration when ip cef accounting non-recursive is configured.

  isdn network  

Platform: IOS based
Where: Configuration
Info: Tells router to be the "master" on T1-CCS link using isdn switch-type primary-ni .

  ipx flooding-unthrottled  

Platform: IOS 12.1
Where: Configuration
Info: Specifies that NLSP flooding should be unthrottled.

  ipx netbios-socket-input-checks  

Platform: IOS 12.1
Where: Configuration
Info: Limits the input of non-type 20 NetBIOS bc packets.

  ipx potential-pseudonode  

Platform: IOS 12.1
Where: Configuration
Info: Specifies to keep backup route and service data for NLSP potential pseudocode.

  ipx server-split-horizon-on-server-paths  

Platform: IOS 12.1
Where: Configuration
Info: Specifies that split horizon SAP occurs on server, not route paths. This command is documented in BugID CSCdm12190.

  ipx update interval {rip  sap} {seconds  passive  changes-only}  

Platform: IOS 12.1
Where: Configuration
Info: Specifies listening but does not send normal periodic SAP updates or flashes/ changes updates. Queries will still be replied to. The update interval is set to the same interval as changes-only. The passive keyword is documented under BugID CSCdj59918.

  isdn {n200  t200  t203} number  

Platform: IOS based
Where: Configuration
Info: Commands change the value of various Layer 2 ISDN timer settings. The number parameter is milliseconds for t200 and t203 and the maximum number of retransmits for the keyword n200 . The current value of ISDN timers can be displayed using the show isdn timers EXEC command. The values of the timer settings depend on the switch type and typically are used only for homologation purposes. The typical value for t200 is 1 second, for t203 is 10 seconds, and for n200 is 3 retransmits.