Cisco Rfgw1d Manual

							 
 
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Ethernet Link 
The current active port will continue to remain as active until there is a loss of link 
(cable disconnection or port shutdown on the other end) on that port.  If a link loss is 
detected, the RFGW-1 will try to make the other available port as Active. If the link is 
not present on both ports, then the last Active port will continue to remain as active 
(of course without being able to receive any input) until a link is detected on any of 
the port.  
Primary Port and Backup Port 
The primary port of a Port-pair is the port which the RFGW-1 will try to make as 
Active during initialization (e.g. bootup, or when changing the redundancy from 
manual to auto, or when changing the detection mode of the port-pair). The user can 
choose either of the port as the primary port for the pair. The other port which is not 
the primary is termed as Backup port.  
Consider the following scenario for example, 
Primary port for port-pair 1 is configured as port 2 with detection mode set to 
Ethernet Link. Then, if during boot up, 
Link status of the ports of pair 1 Active Port 
Link for both Port 1 and Port 2 is up. Port 2 
Link for Port 1 is up. Link for Port 2 is down. Port 1 
Link for Port 1 is down. Link for Port 2 is up. Port 2 
Link for both Port 1 and Port 2 is down. Port 2 
Revert to Primary Port 
The ‘Revert to Primary’ is a functionality that is available when the RFGW-1 is 
operating in Ethernet Link detection mode. If this is enabled and if the current active 
port is the backup port, the RFGW-1 will periodically check the link status on the 
primary port. If it finds the link has come back, then it will change the Active port as 
primary port (even though link continues to exist in the backup). The inspection 
period can be set anywhere from 1 second to 5 minutes. 
Ethernet Link & UDP/L2TPv3  
The current active port will continue to remain as active until there is a loss of link 
(cable disconnection or port shutdown on the other end) or loss of traffic (no 
UDP/L2TPv3 packets – zero input bitrate) on that port. If a link loss is detected or 
UDP/L2TPv3 loss is detected, the RFGW-1 will try to make the other available port 
as Active.  
						

							 
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If the link is not present on both ports, the last active port will continue to remain as 
active. If both the ports has connectivity but none of them is receiving any traffic, 
then the RFGW-1 continuously changes the Active port to monitor for any traffic and 
will lock to the port which receive the traffic first. 
Revert to primary is not supported when the input ports are operating in this 
detection mode. 
Source Specific Multicast Operation in Ethernet Link and Ethernet Link & UDP/L2TPv3 
Modes 
The SSM operation is similar to the 4-port independent mode except that the 
sources will be tried on the current active port of the pair. The SSM operation also 
works the same way in the manual redundancy mode. 
Ethernet Link & UDP/L2TPv3 & TS Socket 
This detection mode is also known as Stream Redundancy mode of operation. It 
behaves the same way as the ‘Ethernet Link & UDP/L2TPv3’ mode except for 
multicast input streams. 
The unicast streams will continue to work the same way as in the ‘Ethernet Link & 
UDP/L2TPv3’ mode. The virtual IP address of the port pair will continue to receive 
unicast traffic only through the Current Active Port. 
For Multicast streams, both the ports behave as active. i.e. input can be received 
either from the backup port or the primary port irrespective of whether that port is 
the Current Active port or not. The Virtual IP address will not be applicable for 
multicast input streams. Both the ports in the port pair will receive multicast traffic 
on their physical IP addresses  
Since both the ports can be used to receive traffic at the same time, any multicast 
input stream can be active on any of the port based on its availability. Different 
sessions can be set up on different ports (of the port-pair) based on which port the 
stream is available. 
When a stream is configured, it will initially get setup on the primary port if it is 
available. If it is not available on the primary port, it will get set on the backup port if 
it is available. If the stream is lost on the currently bound port, then the RFGW-1 will 
automatically switchover the stream to the other port. If a stream is not available on 
both the ports (of the port pair), then it will be kept toggling between the two ports 
until it becomes available on any of the port. 
The IGMP Joins for multicast streams can be sent on one port or both the ports and is 
configurable using the ‘Multicast Join port’, 
 Single port 
 Dual ports  
						

							 
 
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Multicast Join on Single Port 
In this mode, the IGMP join will be sent only on the port where the stream is active. 
If the stream is not available on both the ports then the IGMP will be sent on the port 
which is currently being tried (as the stream will be toggled between both the ports). 
This is mode is useful when the user wants to restrict the unnecessary traffic being 
received. 
Multicast Join on Both Ports 
In this mode, the IGMP join is sent on both the ports of the pair irrespective of on 
which port the stream is active. The switching time for stream, in case of loss, will be 
improved when operating in dual join mode. Also the user can ascertain, from the 
GUI pages, if the traffic is being received on the alternate port and is ready for 
switchover in case of input loss.  
Reversion of Multicast Stream to Primary Port 
The ‘Stream Redundancy,’ as with the Ehternet Link + UDP/L2TPv3 traffic mode of 
operation, does not support the reversion of Active port to Primary port. 
But it supports the reversion of the multicast input streams to primary port, 
manually. When this option is selected, all the multicast input streams that are active 
on the backup port will be forced to become active on the primary port. If the stream 
is not available on the primary port, it will again switch and become active on the 
backup port. The user can also use the ‘Periodic revert to primary for multicast 
streams’ option to schedule this operation hourly or weekly. 
Source Specific Multicast operation in Stream Redundancy mode of operation 
The SSM operation works slightly different from the 4-port independent mode and 
the other Dual port pair modes. 
Under this mode, since the traffic can be received on both ports of the pair, any 
given source IP will be tried on both the ports before the other sources are tried. 
For example, if a session is created on pair-1 with four sources configured, then the 
RFGW-1 will try to bind the stream to the primary source on the primary port of 
pair-1. If the source is available it will lock to it. But if it is not available, then it will 
try to bind to the same primary source on the backup port. If the primary source is 
not available on both the ports, the secondary source will first be tried on the 
primary port and if it is not available then on the backup port. In this way, both 
ports of the pair will be attempted before switching to the next source IP. The port 
switching takes priority over the source switching when the RFGW-1 is operating in 
the stream redundancy mode.  
						

							 
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Ingress-All operation for unicast streams in Dual Port Pair mode 
When the ‘Ingress-All’ setting is enabled on the RFGW-1, the unicast streams can be 
received on either the Current Active port (virtual IP) of Pair-1 or Pair-2. If the 
unicast stream is lost on Active port of pair-1, it will get setup on Active port of pair-
2 and vice-versa. In effect, the unicast stream will have two input ports. 
For network debugging and connectivity testing, each of the four physical GbE input 
ports are also user-configurable for the IP address, and will respond to PING.  Since 
the GbE input ports are not configurable for default gateway, a static route to the 
source network of the PING must be added to the GbE port to facilitate PING 
responses over layer-3 networks.  Static routes can be added via the GUI, using the 
System/ARP & Routes page. 
Gratuitous ARPs can be enabled for the active GbE ports of the Port-Pairs.  Using 
gratuitous ARP, the RF Gateway 1 makes only the virtual IP address known to the 
network.  At layer 2, the RF Gateway 1 advertises the unique MAC address of the 
physical active port. The gratuitous ARP function generates ARPs for both the 
virtual interface as well as the physical interface. 
Socket Redundancy Enhancements 
1 Treat PCR Zero Bitrate as Content Loss  
2 Manual Stream Switching 
Enabling the features 
1 By default, both the features are disabled. 
2 Navigate to System Page and Input Redundancy Reversion page in the left pane. 
3 Enable Treat PCR Zero Bitrate as Content Loss feature. 
4 Enable Manual Stream Switching feature. 
5 Click Apply. 
6 Click Save at the top so this setting will be remembered between reboots. 
Note: The feature can also be enabled through SNMP. 
  
						

							 
 
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Treat PCR Zero Bitrate as Content Loss 
When a streams PCR PID is not available, we would treat the scenario as similar to 
content loss and initiate the input stream switch to the backup stream. The switch to 
the backup stream is initiated without checking for presence of stream on the backup 
port. The switch rules would be same as Socket Redundancy (port switching has 
higher priority over source switching) 
 The stream should have a valid PCR reference. 
 This feature is applicable only for SPTS streams. 
Manual Stream Switching 
On a per stream basis, there will be a setting that will trigger the failover of the 
stream to the other port. This setting would be used to toggle a stream across ports. 
This setting is only for multicast streams available on ports configured for socket 
redundancy.  
This button is available on the Monitor->Input->Stream Replications pop up 
window. Once the stream is toggled, the stream would switch based on the socket 
redundancy priorities (port switching has higher priority over source switching). 
 
  
						

							 
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Configuring GbE Interface Settings 
To Change GbE Input Port Settings 
1 Navigate to the System/IP Network page. 
Result: The IP Network page is displayed. 
 
2 In the appropriate field, enter the IP Address and Subnet Mask settings. 
3 In the Negotiation Mode field, use the drop-down box to select mode (On or Off). 
Note: On is recommended for most applications and required for electrical 
SFPs. 
4 Click Apply. 
5 Click Save.  
Configuring GbE Port Operational Mode 
1 Navigate to the System/IP Network page.  
						

							 
 
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Result: The IP Network page is displayed. 
 
2 In the GbE Data Port Mode field, select Four Port Independent or Dual Port Pairs. 
3 Click Apply. 
4 Click Save.  
Configuring the Video/Data IP Address for GbE Port Pair Mode 
1 Navigate to the System/IP Network page.  
						

							 
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Result: The IP Network page is displayed. 
 
2 In the Video/Data IP field, enter the IP Address. This is the GbE Port Pair virtual 
IP address used for streaming Video/Data. 
3 Click Apply. 
4 Click Save.  
						

							 
 
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Configuring Redundancy for Port Pair Mode 
1 Navigate to the System/IP Network page. 
Result: The IP Network page is displayed. 
 
2 In the Redundancy Mode field, select desired mode.  
a Auto mode enables automatic failover to backup ports 
b Manual mode forces an active port 
3 In the Primary Port field, designate which GbE inputs per port-pair will be 
assigned the primary port. 
4 In the Detection Mode field, select the desired configuration for the failover 
condition. 
 Ethernet Link (will use loss of link for the detection mode) 
 Ethernet Link and UDP or L2TPv3 Packets (adds to the detection mode the 
loss of UDP video or L2TPv3 data packets) 
 Ethernet Link and UDP or L2TPv3 Packets and TS Socket (improves the 
redundancy of multicast inputs to stream level)  
						

							 
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5 In the Multicast Join ports field, configure if the IGMP Joins for multicast streams 
is to be sent on Singe/Both ports. This field is applicable only when the detection 
mode is set to “Ethernet Link & UDP/L2TPv3 Packets & TS Socket”. 
6 In the LOS Timeout field, configure the failover time from the active to inactive 
port. 
7 In the Revert to Primary field, if automatic revert is desired, set the parameter to 
Enabled. This field will not be applicable when the detection mode is set to 
Ethernet Link & UDP/L2TPv3 Packets & TS Socket and will be set to Disabled. 
8 In the Revert Check Time field, enter an uptime range for the primary port before a 
reversion occurs. 
Note: Valid range is 0-300 seconds. 
9 Click Apply. 
10 Click Save.  
Configuring Reversion of Multicast Streams to Primary Port 
1 Navigate to the System/Input Redundancy Revert page. 
Result: The Input Redundancy Revert page is displayed. 
 
2 Check or Uncheck the Schedule Revert To Primary Gbe Port to Enable/Disable 
the automatic reversion.  
3 Select the Reversion type as either one of the below. 
- Revert on These Days 
- Revert Every Xhours. 
4 If Selecting the Revert on These Days, configure the days and time of the day 
when the reversion is to occur.