Cisco 11503 Administration Guide - Page 328
Echo Keepalive, set EXIT_MSG Send: failure
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Script Keepalive Examples Chapter 8 Using the CSS Scripting Language ! This may require a little explanation. Since we just want to see ! if the DNS server is alive we will send a simple DNS Query. This ! query is hard coded in hexadecimal and sent raw to the DNS server. ! The DNS request has a 12 byte header (as seen for the first 12 bytes ! of hex) and then a DNS name (ie. www.cisco.com). Lastly it follows ! with some null termination and a few bytes representing query type. ! See RFC-1035 for more. set EXIT_MSG "Send: failure" socket send ${SOCKET} "0002010000010000000000000377777705636973636f03636f6d0000010001" raw ! Receive some unexplained response. We don't care what it is because ! an unstable DNS server or a non-existent one would probably not send ! us any data back at all. set EXIT_MSG "Receive: Failed to receive data" socket receive ${SOCKET} no set EXIT_MSG socket disconnect ${SOCKET} exit script 0 Echo Keepalive !no echo Filename: ap-kal-echo ! Parameters: HostName [ udp | tcp ] ! ! Description: ! This script will send a TCP or UDP echo (depending on what the ! user has passed to us) that will echo "Hello Cisco" to the ! remote host, and expect it to come back. The default protocol ! is TCP. ! ! Failure Upon: ! 1. Not establishing a connection with the host (TCP Only). ! 2. Not being able to retrieve an echoed message back ! Make sure the user has a qualified number of arguments if ${ARGS}[#] "NEQ" "2" if ${ARGS}[#] "NEQ" "1" echo "Usage: ap-kal-echo \'Hostname [ udp | tcp ]\'" exit script 1 endbranch endbranch 8-60 Cisco Content Services Switch Administration Guide OL-5647-02