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Full Discussion: Expect script help needed- script failing if router unavailable
Top Forums Shell Programming and Scripting Expect script help needed- script failing if router unavailable Post 302523935 by mrkz1974 on Friday 20th of May 2011 10:04:37 AM
Old 05-20-2011
Expect script help needed- skipping unavailable routers?
Hey all. Sometimes I'm tasked to change some router configs for the entire network (over 3,000 Cisco routers). Most of the time its a global config parameter so its done with a loop and an IP list as its the same configuration change for all routers. This is working OK.

However, sometimes an expect script must be generated for ALL routers since the config changes are different for each router. The way we approach it, we divide the routers per regional domains (6 in total), and produce 1 expect script per regional domain. The problem I'm having is that when I schedule these type of expect scripts to run via crontab, they usually get hung anytime a router fails to respond (maintenance, outage, etc). How can I make the script go to the next router if a router cannot be reached? Here's a sample line of the 20K lines:

....
Code:
#
set timeout 10
spawn telnet 10.156.112.1
match_max 100000
expect Username:
sleep .1
send -s -- "username\r"
expect Password:
sleep .1
send -s --  "passwordstring\r"
expect *
sleep .1
send -s --  "conf t\r"
expect *
sleep .2
send -s -- "no ip flow-export destination 172.17.187.127 9995\r"
expect *
sleep .2
send -s -- "no ip flow-export destination 10.24.180.110 9995\r"
expect *
sleep .2
send -s -- "ip flow-export destination 172.17.187.188 9995\r"
expect *
sleep .2
send -s -- "ip flow-export destination 10.24.180.110 9995\r"
expect *
sleep .2
send -s -- "end\r"
expect *
sleep .4
send -s --  "wr mem\r"
expect *
sleep .2
send -s --  "exit\r"
expect eof
#
#
set timeout 10
spawn telnet 10.156.112.2
match_max 100000
expect Username:
sleep .1
send -s -- "username\r"
expect Password:
sleep .1
send -s --  "passwordstring\r"
expect *
sleep .1
send -s --  "conf t\r"
expect *
sleep .2
send -s -- "no ip flow-export destination 172.17.187.127 9995\r"
expect *
sleep .2
send -s -- "no ip flow-export destination 10.24.180.110 9995\r"
expect *
sleep .2
send -s -- "ip flow-export destination 172.17.187.188 9995\r"
expect *
sleep .2
send -s -- "ip flow-export destination 10.24.180.110 9995\r"
expect *
sleep .2
send -s -- "end\r"
expect *
sleep .4
send -s --  "wr mem\r"
expect *
sleep .2
send -s --  "exit\r"
expect eof
#
#

Thanks!
Marcos
Last edited by mrkz1974; 05-20-2011 at 11:42 AM..
 

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LEARN ABOUT SUNOS

defaultrouter

defaultrouter(4)						   File Formats 						  defaultrouter(4)

NAME

       defaultrouter - configuration file for default router(s)

SYNOPSIS

       /etc/defaultrouter

DESCRIPTION

       The /etc/defaultrouter file specifies a IPv4 host's default router(s).

       The format of the file is as follows:

       IP_address
       ...

       The  /etc/defaultrouter	file can contain the IP addresses or hostnames of one or more default routers, with each entry on its own line. If
       you use hostnames, each hostname must also be listed in the local /etc/hosts file, because no name services are running at  the	time  that
       defaultrouter is read.

       Lines beginning with the ``#'' character are treated as comments.

       The  default  routes  listed  in this file replace those added by the kernel during diskless booting. An empty /etc/defaultrouter file will
       cause the default route added by the kernel to be deleted.

       Use of a default route, whether received from a DHCP server or from /etc/defaultrouter, prevents a machine from acting as an  IPv4  router.
       You can use routeadm(1M) to override this behavior.

FILES

       /etc/defaultrouter	       Configuration file containing the hostnames or IP addresses of one or more default routers.

SEE ALSO

       in.rdisc(1M), in.routed(1M), routeadm(1M), hosts(4)

SunOS 5.10							    17 Aug 2004 						  defaultrouter(4)
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