Nick's Network Corner

So one of the issues coming up that was a minor but easily fixable was an ACL change that was widespread.  Throughout this change a host needed to be allowed to several hosts in multiple octets. An issue that they had was the ACL would change when they looked up the ACL list and didn't know why. ACL Request Example: Permit connection from My Personal PC to all Active Directory Servers. MY PC :  10.10.10.11 Active Directory Servers:  192.168.X.9 - 12        ****Each store is on the 192.168.X.9 through 12. The "X" represents the number relevant to the store location.  The ACL that was placed: access-list 100 permit ip host 10.10.10.11 192.168.1. 9 0.0.0.255.3 Show access-list results: 20 permit ip host 10.10.10.11 192.168.0. 8 0.0.255.3 So what happened? The ACL was put in place and they expected to see a "9" as the starting digit. Allowing an increment through 9, 10, 11, 12 for access.  The output is the way it is...

One of the errors that might come up if running on the older Unity system is you cannot access the webpage. This is an error I've run into several times. Although Unity is still running and voicemails are working! You will see something similar to the above image or connection reset.  Going through you should open a Remote Desktop Session to the Unity Box to make sure you can first log into it that way. Open up a run prompt and type logfiles it should bring up a folder that has the HTTPERR log. Inside this log file you may see errors similar to: 2013-03-15 14:12:43 - - - - - - - - - 1_Connections_Refused - 2013-03-15 14:13:43 - - - - - - - - - 1_Connections_Refused - 2013-03-15 14:18:58 - - - - - - - - - 2_Connections_Refused - 2013-03-15 14:20:33 - - - - - - - - - 1_Connections_Refused - 2013-03-15 14:21:53 - - - - - - - - - 1_Connections_Refused - 2013-03-15 14:21:58 - - - - - - - - - 1_Connections_Refused - A couple changes that we can make and just min...

Creating Route Patterns: Route Pattern Route List Route Group Device ( Router, Trunk , ETC) X = Single Digit @ = NANP !   = One or more digits (0-9) [x-y] = Generic range notation [^x-y] Exclusion range notation .  = Termination access code # = Terminates interdigit timeout <wildcard>?  = matches zero or more occurrences of any digit that matches the wildcard <wildcard> +  = matches one or more occurrences of any digit that matches the wildcard \+  = matches the + sign as part of a number; used for globalized E.164 calling Intrasite  : Calls within a single site (ON NET) Intersite : Calls between sites         on-net : users use internal directory numbers        off-net : users use route patterns to send calls to other site through gateway PSTN : Uses route patterns to send calls to PSTN destinations Routing Components: DN ( Directory Numbers ...

Types of End Points SCCP SIP H323 3rd Party SIP Audio Video Phone Startup Process Phone obtains power from switch or powerblock Phone loads locally stored image(PhoneLoad) If no local voice VLAN ID is configured the Cisco IP Phone sends out a CDP frame with a VOIP VLAN query If the Cisco switch has a voice VLAN configured it will send out a CDP frame with the VLAN ID for the phone If DHCP is enabled it requests IP and TFTP server information otherwise it uses static Phone connects to TFTP and requests files in the following order CTLSEP(MAC).tlv SEP(MAC).cnf.xml (SCCP) SIP(MAC).cnf (SIP) If none of the previously requested configuration files was found the phone requests a default config called XMLDefault.cnf.xml Cisco IP phone compares its installed phone load version with the load version defined within received configuration file. If the load version is different it requests the new load vers...