I have added a new irule to VS which already have few irule already configured...
Once i added a new irule whose URI other than previous irule , cause issued to earlier URL configured for redirection.
Not sure why
what precautions should i take so that it will not cause issue to existing url
Is your new iRule getting matched first? It may be the case that other existing URLs on the same VS are matching condition defined under new iRule and as it is getting matched first, it is causing issues. Kindly keep new iRule below all the existing iRules and then try so with this new iRule will get match after existing iRules.