You should obviously use TCP as your encapsulation type here but the question gives you additional information about the address resolution packets and unnumbered information frames. From this additional information, you should research these features and find that these are in fact transmitted by default in UDP to avoid congestion if errors are encountered. To ensure these features are transmitted reliably in TCP, you should configure R1 and R4 with the command dlsw udp-disable. You should be peering from loopback interfaces and configure VLAN2 and VLAN3 as the DLSw bridge points on your routers. If you have configured this correctly as shown in Example 2-66 through Example 2-68, you have scored 2 points. Example 2-66. R1 Initial DLSw Configurationdlsw local-peer peer-id 10.1.1.1 dlsw remote-peer 0 tcp 10.4.4.4 dlsw bridge-group 1 dlsw udp-disable ! interface FastEthernet0/0 bridge-group 1 ! bridge 1 protocol ieee Example 2-67. R4 Initial DLSw Configurationdlsw local-peer peer-id 10.4.4.4 dlsw remote-peer 0 tcp 10.6.6.6 dlsw remote-peer 0 tcp 10.1.1.1 dlsw bridge-group 1 dlsw udp-disable ! interface FastEthernet0/0 bridge-group 1 ! bridge 1 protocol ieee Example 2-68. R6 Initial DLSw Configurationdlsw local-peer peer-id 10.6.6.6 dlsw remote-peer 0 tcp 10.4.4.4 dlsw bridge-group 1 dlsw udp-disable ! interface FastEthernet0/0 bridge-group 1 ! bridge 1 protocol ieee
Because you have duplicate paths to the end destination, you should configure DLSw round-robin load sharing with the command dlsw load-balance round-robin on R4. If you have configured this correctly, you have scored 1 point.
You need to configure dynamic peering, which will only initiate sessions when you have valid user traffic to transport. If you have configured this correctly as shown in Example 2-69 through Example 2-71, which also show the final DLSw configurations for R1, R4, and R6, you have scored 1 point. Example 2-69. R1 Final DLSw Configurationdlsw local-peer peer-id 10.1.1.1 dlsw remote-peer 0 tcp 10.4.4.4 keepalive 0 timeout 90 dynamic dlsw bridge-group 1 dlsw udp-disable ! interface FastEthernet0/0 bridge-group 1 ! bridge 1 protocol ieee Example 2-70. R4 Final DLSw Configurationdlsw local-peer peer-id 10.4.4.4 dlsw load-balance round-robin dlsw remote-peer 0 tcp 10.6.6.6 keepalive 0 timeout 90 dynamic dlsw remote-peer 0 tcp 10.1.1.1 keepalive 0 timeout 90 dynamic dlsw bridge-group 1 dlsw udp-disable ! interface FastEthernet0/0 bridge-group 1 ! bridge 1 protocol ieee Example 2-71. R6 Final DLSw Configurationdlsw local-peer peer-id 10.6.6.6 dlsw remote-peer 0 tcp 10.4.4.4 keepalive 0 timeout 90 dynamic dlsw bridge-group 1 dlsw udp-disable ! interface FastEthernet0/0 bridge-group 1 ! bridge 1 protocol ieee NOTE The keepalive and timeout figures shown are the defaults. |