Cisco 3825 Software Configuration Guide - Page 43

Chapter 1 Overview of the Cisco 3825 Mobile Wireless Edge Router New Features in Cisco IOS Release 12.4(16)MR UMTS-Iub(ATM0/IMA0.1 - ATM0/IMA.1): Peering Information UMTS-Iub(ATM0/IMA0.1 - ATM0/IMA.1): Local (192.168.10.2:6666) States: UMTS-Iub(ATM0/IMA0.1 - ATM0/IMA.1): Connect State: OPEN UMTS-Iub(ATM0/IMA0.1 - ATM0/IMA.1): Redundancy State: ACTIVE UMTS-Iub(ATM0/IMA0.1 - ATM0/IMA.1): Version: 4 UMTS-Iub(ATM0/IMA0.1 - ATM0/IMA.1): Remote (192.168.10.1:6666) States: UMTS-Iub(ATM0/IMA0.1 - ATM0/IMA.1): Version: 4 Note In the previous output, the local shorthaul/interface name appears before the dash (-), and the remote shorthaul/interface name appears after the dash (-). 4. An admin shutdown of the base ATM interface will shut down all the peering instances, including the primary peering and all the sub-interface peering(s). (In other words, they will move to the CLOSED state). 5. An admin shutdown of an ATM sub-interface will shut down only the peering for that sub-interface. (In other words, the admin shutdown of the ATM sub-interface will make the PVCs on that sub-interface inactive, but it won't change the status of the PVCs on the other end of the shorthaul, Node B or RNC.) 6. When the primary backhaul goes down and the primary peering goes down, the primary peering will start sending Alarm Indication Signals (AISs) on the shorthaul, and; therefore, bring down the shorthaul like before. So all shorthaul traffic will stop, including the PVC traffic off-loaded to the alternate backhaul(s). (In this situation, the sub-interface peering connection state will stay OPEN as long as the alternate backhaul doesn't go down). 7. When an alternate or sub-interface backhaul goes down, the sub-interface peering will go down, but it won't bring down the shorthaul or start any alarms on the T1/E1 link. So primary backhaul traffic won't be affected. (In this case, the sub-interface's state will not be changed since the sub-interface is only the logical interface and changing its state will not generate any notification to the Node B or RNC at the ATM level. If the Node B/RNC wants to be able to detect an alternate backhaul down situation, configure the OAM-CC on the PVCs that are off-loaded to the alternate/sub-interface backhaul). 8. Cannot configure the qsaal type PVC under the ATM sub-interface, which means the AAL5 type traffic cannot be off-loaded to the alternate backhaul unless they are configured as the AAL0 type on the Cisco 3825 router. UMTS QoS Three new commands are added using the Interface Configuration mode for this new feature: umts-iub set dscp, umts-iub set peering dscp, and gsm-abis set dscp and one new ATM-VC Interface Configuration command: umts-iub set dscp (see the "Configuring UMTS QoS" section on page 4-46 and Appendix A, "Cisco 3825 Mobile Wireless Edge Router RAN-O Command Reference"). These new commands allow you to perform the following: • UMTS Shorthaul Interface - Set the default description value to tag the backhaul packet including peering and data generated from the shorthaul in a UMTS Iub configuration. - Set the description value in the UMTS Iub configuration such that it overwrites the default value defined previously. It is also used to tag the peering backhaul packet. OL-15667-03 Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide 1-33