Spectrio/IW Actions:
To troubleshoot the issue, our team moved ns1.channelshd.com and ns2.channelshd.com outside of the load balancer. The domains were tested afterwards and they now all seem to be properly resolving.
Users should be able to login to test and confirm that their CCHD is properly launching.
If problems resume, the DNS may still be caching bad information. If that is the case, please have the user go through the following steps to flush that cache in order, as the caching could be occurring at a browser, workstation or network level.
- Clear Cache in Browser, Close and Relaunch Browser
- Restart Workstation and Relaunch Browser
- Flush DNS on Machine - May need IT Team to assist - Link to commands to run on workstation
(https://support.pearson.com/getsupport/s/article/Reset-an-Internet-Connection-Flush-DNS)
- If Step 3 is unsuccessful, your IT/Networking Team will need to look into flushing the cache for those domains at the network level.
Clear DNS Resolvers: They should have ns1.channelshd.com and ns2.channelshd.com both pointing to 3. addresses.
jtsvetkoff:~ jtsvetkoff$ dig -t NS channelshd.com
; <<>> DiG 9.10.6 <<>> -t NS channelshd.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41970
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 3
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;channelshd.com. IN NS
;; ANSWER SECTION:
channelshd.com. 300 IN NS ns2.channelshd.com.
channelshd.com. 300 IN NS ns1.channelshd.com.
;; ADDITIONAL SECTION:
ns2.channelshd.com. 5 IN A 3.130.234.96
ns1.channelshd.com. 5 IN A 3.130.189.161