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2-22 SmartSwitch ATM User Guide
Creating an Emulated LAN IP Over ATM and LANE
Similarly, enter the show elan 1 command on SW2 to obtain SW2’s LECS address
SW2 # show elan 1
ELAN 1
==============================================================================
ELAN Number : 1
LECS Address : 39:00:00:00:00:00:00:00:00:00:BF:BA:26:00:00:1D:BF:BA:26:01 — LECS address on SW2
LES Address : 39:00:00:00:00:00:00:00:00:00:BF:BA:26:00:00:1D:BF:BA:26:03
ELAN Name : elan1
ELAN Type : 802.3
MTU : 1516
Connection Method : SVC
Distribute VPI/VCI: 0/0
Distribute Method : PROXY
Multipoint : YES
Error Logging : NO
Min TD Negotiation : NO
SW2 #
8.
On SW1 use the add lecsneighbor command to specify the ATM address of the LECS on SW2
SW1 # add lecsneighbor
NeighborATMAddress() : 39:00:00:00:00:00:00:00:00:00:bf:ba:26:00:00:1d:bf:ba:26:01
SW1 #
Similarly, on SW2 use the add lecsneighbor command to specify the ATM address of the LECS on SW1
SW2 # add lecsneighbor
NeighborATMAddress() : 39:00:00:00:00:00:00:00:00:00:a3:87:0b:00:00:1d:a3:87:0b:01
SW2 #
The LECSs on switch SW1 and SW2 are now configured for LNNI and are running redundantly. If, for example,
LANE services goes down on SW1, its clients can rejoin the ELAN by registering with LANE services on SW2.
Use the
show lecsneighborinfo command on any LNNI active switch running an LECS to see a list of known
neighbor LECSs. For example, on SW1, entering
show lecsneighborinfo shows information about SW2:
SW1 # show lecsneighborinfo
LECS Sync PMP VCC VPI/VCI : 0/48
Outgoing Incoming
Neighbor ATM Address State VPI/VCI
==============================================================================
39:00:00:00:00:00:00:00:00:00:BF:BA:26:00:00:1D:BF:BA:26:01 Active 0/49
SW1 #
Configuring LNNI Distributed LES/BUS Servers
Under LNNI each switch running an LECS is capable of supporting eight (8) switches running an LES/BUS on the
same ELAN. LES/BUS neighbor information is distributed to the LES/BUS switches by the LECSs. However, server
cache information is distributed among the LES/BUS servers themselves using SCSP (Server Cache Synchronization
Protocol). To assure that SCSP information can be exchanged between all LES/BUS switches, the switches should be