232 CHAPTER 7: DLSW CONFIGURATION[RouterA] interface ethernet 1/1[RouterA-Ethernet1/1] bridge-set 1[RouterA-Ethernet1/1] quit# Enable multicast.[RouterA] multicast routing-enable[RouterA] interface ethernet 1/0[RouterA-Ethernet1/0] pim dm[RouterA-Ethernet1/0] igmp enable[RouterA-Ethernet1/0] igmp static-group 224.0.10.0[RouterA-Ethernet1/0] quit# Configure local DLSw peers, configure the permit-dynamic keyword to allow aremote peer that is not preconfigured to initiate a TCP connection for dynamicremote peer creation.[RouterA] dlsw local 1.1.1.1 permit-dynamic# Enable DLSw multicast, set the maximum number explorer retries and specify alocal bridge set.[RouterA] dlsw multicast interface ethernet 1/0[RouterA] dlsw max-transmission 3[RouterA] dlsw bridge-set 12 Configure Router B and Router CBefore configuring Router B and Router C, first make sure of which DLSw versionthey support. If they are DLSw v2.0 capable, the configuration is similar as onRouter A; if they are DLSw v1.0 capable, remove the multicast and explorer frameretransmission part from the configuration.For the configuration on the Cisco router, refer to Cisco documentation.Troubleshooting DLSw Proper communication of the DLSw needs sound cooperation between theinvolved SNA devices and DLSw-capable routers. A fault in the cooperationbetween any two nodes may cause connection failure.Unable to Establish aTCP ConnectionSymptomA TCP connection cannot be established and the status information given by thedisplay dlsw remote command is DISCONNECT.AnalysisTCP connection establishment is the first step in successful DLSw connection.Failure in establishing a TCP connection is usually caused by problems between thetwo routers, normally incorrect IP routing configuration.SolutionCheck whether the IP address of the remote peer is reachable by using the pingcommand carrying the source address. Alternatively, use the display iprouting-table command to check whether there is a route to the network
