Specifications

16-12
Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Software Configuration Guide, Cisco IOS Release 15.1(3)MR
OL-26895-01
Chapter 16 Configuring Clocking and Timing
Configuring Clocking and Timing
Note To view a sample configuration of multicast/PTP redundancy, see Clocking Sample Configurations,
page 16-17.
Configuring Pseudowire-Based Clocking with Adaptive Clock Recovery
The Cisco MWR 2941 supports the following adaptive clock recovery modes:
• In-band master mode—The Cisco MWR 2941 provides clocking to slave devices using the headers
in a packet stream. To configure this clocking mode, see Configuring In-Band Master Mode.
• In-band slave mode—The Cisco MWR 2941 receives clocking from a master clock using the
headers from a packet stream. To configure this clocking mode, see Configuring In-Band Slave
Mode.
• Out-of-band slave mode—The Cisco MWR 2941 receives clocking from a master clock using
dedicated packets for timing. To configure this clocking mode, see Configuring Out-of-Band Slave
Mode.
Note The Cisco MWR 2941 currently does not support out-of-band master mode.
Step 12
Router(config)# interface
gigabitethernet 0/1
Router(config-if)# description
physical interface to PTP multicast
source
Router(config-if)# switchport trunk
allowed vlan 1,2,402,1002-1005
Router(config-if)# switchport mode
trunk
Configures the second gigabit Ethernet interface connected to the
multicast PTP clock source.
Step 13
Router(config-if)# exit
Router(config)#
Exits the gigabitEthernet interface.
Step 14
Router(config)# ip pim rp-address
10.2.1.1 5 override
If you need to statically configure a PIM rendezvous point (RP) for a
multicast group, use the ip pim rp-address command in global
configuration mode.
Step 15
Router(config)# access-list 5
permit 224.0.1.129
Creates an access list entry to allow PTP traffic from the router’s PTP
multicast address.
Step 16
Router(config)# exit
Router#
Exits configuration mode.
Step 17
Router# show ip mroute
Use the show ip mroute command to verify your configuration.
Step 18
exit
Example:
Router(config)# exit
Router#
Exits configuration mode.
Command Purpose