Configuring Bandwidth over a Hybrid Multipoint Network

If the multipoint network has differing speeds allocated to the VCs, a more complex solution is needed. There are two main approaches:  ? Take the lowest CIR and multiply it by the number of circuits. Apply the product as the bandwidth of the physical interface. The problem with this configur...

Disabling Link Up/Down Traps per Interface

To disable SNMP link-status change traps for a particular interface, use the following configuration command: Router#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router(config)#interface Serial0/0 Router(config-if)#no snmp trap link-status Router(confi...

Troubleshooting VTP

 If a switch does not seem to be receiving updated information from a VTP server, consider these possible causes:

Controlling Multicast Scope with Administratively Scoped Addressing

To configure regions of multicast scope using addressing rather than TTL, using the ip multicast boundary interface command: Router1#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router1(config)#ip multicast-routing Router1(config)#access-list 15 den...

Filtering Based on TCP Header Flags

The following ACL blocks several illegal combinations of TCP header flags: Router1#configure terminal Enter configuration commands, one per line.   End with CNTL/Z. Router1(config)#access-list 161 deny tcp any any ack fin psh rst syn urg Router1(config)#access-list 161 deny tcp ...

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