Huawei optix

Welcoming 3G Services——the MSTP+ Network Design & Configuration

All the Node B should be aggregated through RTN with MSTP+equipment at aggregation site and then integrated with RNC through two active/standby switch followed by protected Tx path. Also MSTP node should be aggregated with MSTP+ at RNC Station which carrying EoS service to integrate Node B. Please see the following basic network architecture as per requirement.

Huawei optix

According to the customer requirement network architecture and connection diagram is given bellow. Here we developed MPLS network with 1:1 MPLS Tunnel Protection. MSTP+nodes are configured as E-Line via PW service at aggregation site and VPLS service at RNC station.VRRP Heart Bit of master/slave switch should be pass through MSTP+equipment.Link protection achieved between MSTP+and MSTP node by configuring LAG at MSTP+and DLAG at MSTP+end.

For an example,4 interfaces  f two different PEG8 Boards(port 1-2 and port 3-4) are configured as UNI interfaces of VPLS service. Port1 and Port4 are connected to the corresponding Master and Slave Switch and configured Admin VRRP VLAN to pass VRRP Heart Bit from Master to Slave Switch. Port 2 and Port 3 are connected with two different EGS4 Boards of MSTP equipment and configured LAG(as static,load non-sharing & non-revertive mode) at MSTP+and DLAG at MSTP node.

 

1.   1:1APSTunnelProtectionconfiguredtoutilizebandwidthofprotectionpathforotheraggregated service carryingMSTP+nodeduringnonfailurecasesofworkingtunnel.

2.   ServicescarriedviaPWinsteadofporttosharetotalMPLSTunnelbandwidthamongNnumberofservices.

3.   Using different UNI interfaces (in above example port 1/4 and port 2/3) from different PEG8 board under same VPLS services to achieve board level protection.

4.   In case of MSTP+and MSTP inter connection,LAG and DLAG protection scheme adapted instead of BPS at MSTPtoavoidunnecessaryalarmreportedatprotectionpathinterfaceofMSTP+node   i.e ETH Link Down (as MSTP+doesn’t support BPS protection scheme).

5.   Finally service provisioning becomes more convenient to integrate new Node B by only adding VLAN sat UNIinterfacesofVPLSserviceandalsosimplifyconfigurationprocesstoaddnumberaggregatedPW services by adding their respective PWID sand VLANs.

At first Master and Slave switch was directly connected with each other to pass VRRP Hear Bit. When we interconnect MSTP+with both Switch through two UNI interfaces of VPLS service, it became loop as both UNI interface flow the same service VLAN and also same VLAN passed between Master & Slave Switch(as all the interfaces configured as layer two). Please find the following diagram for reference.

 

To avoid loop generation problem we passed the VRRP Heart Bit through MSTP+i.e. through UNI Interfaces(port 1&4) of VPLS Service and configured Admin VRRP VLAN at both UNI inter faces which used to trace the path status and to change the state(master/backup)of Switch.

After completion of MPLS Network Configuration through MSTP+equipment as described above, following test has been per formed before going to put live traffic.And now the 3G services through MPLS Network are running perfectly and soundly.

 

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