4600 Series IP Telephone LAN Administrator’s Guide
MCIPADD={list of DNS names},MCPORT=yyyy,TFTPSRVR={list of DNS names},TFTPDIR=<path>
In configurations where the upgrade script and application files are in the default directory, the TFTPDIR=<path> should not be used.
You do not have to use Option 176. For example, if the DNS server is specified in Option 6, and the Domain Name is specified in Option 15, you can use the configured names "AvayaTFTPServer" and "AvayaCallServer" for TFTPSRVR and MCIPADD, respectively.
The Call Server Name, TFTP Server Name, and SMTP Server Name must each be no more than 32 characters in length.
Where xxx.xxx.xxx.xxx is one or more IP addresses for DEFINITY® /MultiVantageTM CLAN IP boards, yyyy is the DEFINITY/MultiVantage CLAN port (1719),
zzz.zzz.zzz.zzzis one or more IP addresses for TFTP servers, and <path> is the location of the location of the upgrade script and application files on the TFTP server as entered in Table
■ Examples of good DNS administration include the following:
-Option 6: "aaa.aaa.aaa.aaa"
-Option 15: "dnsexample.yourco.com"
-Option 66: "tftpserver.yourco.com,zzz.zzz.zzz.zzz"
-Option 176: "MCIPADD=xxxx.xxx.xxx.xxx"
■Depending on the DHCP application you choose, you should be aware of the fact that the application most likely will not immediately recycle expired DHCP leases. An expired lease may remain reserved for the original client for a day or more (for example, Windows NT DHCP reserves expired leases for about one day). The intent of this reservation period is to protect a client’s lease in case the client and the DHCP server are in two different time zones, the computers’ clocks are not in synch, or the client is not on the network when the lease expires.
■The implication of this fact may be seen in the following example: Assume 2 IP addresses (hence 2 possible DHCP leases) and 3 IP telephones, two of which are using the 2 available IP addresses. When the lease expires for the first two telephones, the third will not be able to get a lease (even if the other two telephones have been removed from the network), until the reservation period expires.
