Cisco Cisco Internet Streamer Application Notas de publicación

Release 2.5.9 of the Cisco Internet Streamer CDS introduces the Multiple Logical IP Addresses feature 
and the Flash Media Streaming Query String feature.

The Multiple Logical IP Addresses feature allows for the configuration of multiple logical IP addresses 
for each gigabit Ethernet interface, port channel, or standby interface on an SE. Each logical IP address 
can be assigned to a delivery service. 

The Multiple Logical IP Addresses feature supports up to 24 unique IP addresses within the same subnet 
for the same interface. Up to 24 unique IP addresses are supported in the SE to SR keepalive messages.

To configure multiple IP addresses on an interface use the ip address command multiple times in the 
config-if mode, or use the range keyword option (ip address range).

(config-if)# ip address <ip_addr> <subnetmask>

(config-if)# ip address range <lower_ip_addr_range> <upper_ip_addr_range> <subnetmask>

To view configured IP address for an interface, use the show interface command or the show 
running-config command. The IP address assignments for each SE can also be displayed in the CDSM 
GUI by viewing the Network Interfaces page (Devices > Devices > General Settings > Network > 
Network Interfaces). 

SNMP traps are still per interface; not per IP address. However, transaction logs include the server IP 
address.

After assigning the SEs to a delivery service, you can assign one of the IP addresses for that SE to the 
delivery service by using the Assign IP Address page (Services > Service Definition > Delivery 
Services > Assign IP Address).

If a delivery service is mapped to a specific IP address, the SR does not perform load balancing to any 
other IP address. If the delivery service is not mapped to an IP address, load balancing is performed.

Removing an IP address from a delivery service interrupts the service. Changing an IP address for a 
delivery service causes all new requests to use the new IP address.

If using Device Groups for delivery services, assigning IP addresses to the SE interfaces must happen 
before assigning the device to the device group. 

Previously, if an RTMP request had a query string in the URL for VOD, the Web Engine could decide 
whether or not to cache the content based on the Web Engine configuration. However, if the query string 
in the RTMP URL included the end-user specific parameters and not the stream name, every request 
would have a different URL because every user has a different query string. This leads to the same 
content getting cached multiple times.