Customer premises equipment (CPE) usually includes the router, the CSU/DSU, the cabling, and often an analog modem for OOB (out-of-band) access for monitoring and management. ISPs typically offer the customer a choice of buying the CPE and access line, buying just the access line, or just paying a monthly fee with all equipment and access needs taken care of by the ISP. As with most everything, any arrangement is available at the right price. ISPs usually are responsible for ..
Broadcast Suppression: Advanced Traffic Management
Some members of the Catalyst family support a feature intended to minimize the transfer of broadcast and multicast frames sourced from a port. The broadcast/multicast suppression feature measures the broadcast and multicast traffic coming from a device and restricts the flow of the frames across the Catalyst switch fabric if the amount of the traffic exceeds a configurable threshold. Depending upon your version of Catalyst, you have two methods to measure the broadcast and m..
For both Frame Relay PVC and SVC, access to a Frame Relay network is generally made through private leased lines at various speeds ranging from 56 kbps to 45 Mbps. From the Frame Relay user's perspective, the leased line terminates at the Frame Relay service providers' Frame Relay switch. When SVC is employed, the service provider does not provision a dedicated virtual circuit between the end points of the connection. A SVC through a Frame Relay network is set up to the dest..
Making HSRP React to Problems on Other Interfaces
The standby track configuration command reduces the priority of an active HSRP router into a standby mode when one of its interfaces becomes unavailable. If the priority drops far enough, another router will take over: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#interface FastEthernet0/1 Router1(config-if)#standby 1 ip 172.22.1.1 Router1(config-if)#standby 1 priority 120 Router1(config-if)#standby 1 pree..
DHCP-Secured IP Address Assignment
To enable secured IP address assignment, use the update arp command:Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z.Router1(config)#ip dhcp pool OREILLYRouter1(dhcp-config)#update arpRouter1(dhcp-config)#endRouter1#Beginning with IOS Version 12.2(15)T, Cisco introduced the concept of DHCP secured IP address assignment. This feature synchronizes the ARP entry to the DHCP binding to ensure that IP addresses assign via DHCP can'..
