Administration of the Avaya G350 Media Gateway - Avaya Support

Dynamic CAC●●●Use the extended-keepalive failure-retries command to set the number ofconsecutive failed keepalive packets necessary to set the interface’s keepalive status asdown. The default value is 4.Use the extended-keepalive interval command to set the interval (in seconds)between keepalive packets. The default value is 5.Use the extended-keepalive source-address command to set the source IPaddress of the keepalive packets. The default value is the interface’s primary IP address.● Use the show extended-keepalive command to display the interface’s extendedkeepalive status and parameters.The following example configures extended keepalive on interface FastEthernet 10/2 to sendkeepalive packets to IP address 135.64.2.12 using MAC 11.22.33.44.55.66, at five secondintervals. If a response is not received within one second, the keepalive packet is considered tohave failed. After three consecutive failed packets, the interface is declared to be down. Aftertwo consecutive successful packets, the interface is declared to be up.G350-001# interface FastEthernet 10/2G350-001(super-if:FastEthernet 10/2)# extended-keepalive 135.64.2.1211.22.33.44.55.66G350-001(super-if:FastEthernet 10/2)# extended-keepalive interval 5G350-001(super-if:FastEthernet 10/2)# extended-keepalive timeout 1G350-001(super-if:FastEthernet 10/2)# extended-keepalivefailure-retries 3G350-001(super-if:FastEthernet 10/2)# extended-keepalivesuccess-retries 2Done!A special version of the keepalive feature is available for GRE tunnels. See keepalive onpage 171.Dynamic CACDynamic Call Admission Control (CAC) provides enhanced control over WAN bandwidth. WhenDynamic CAC is enabled on an interface, the G350 informs the MGC of the actual bandwidth ofthe interface and tells the MGC to block calls when the bandwidth is exhausted.Dynamic CAC is especially useful in situations where a primary link is down and a backup linkwith less bandwidth than the primary link is active in its place. Without dynamic CAC, the MGCis unaware that the interface has switched over to the backup link. Thus, the MGC is unaware ofthe resulting changes in network topology and bandwidth available for the interface.Consequently, the MGC might allow calls through the interface that require more than thecurrently available bandwidth.Issue 3 January 2005 101