Acting as a DHCP Server

The following steps configure an IOS device as a DHCP server:  Step 1. Create a pool of addresses to assign to clients. The syntax for this command is: Router(config)#ip dhcp pool name   Step 2. Assign a network to the pool:  Router(config-dhcp)#network network/mask  Step 3. Tell the client how long it can keep the address—this is called the lease period. Most DHCP implementations use a three-day lease, but IOS defaults to one day:  Router..

IPv4 Multicast Layer 3 Switching Overview

The Policy Feature Card (PFC) provides Layer 3 switching for IP multicast flows using the hardware replication table and hardware Cisco Express Forwarding (CEF), which uses the forwarding information base (FIB) and the adjacency table on the PFC. In systems with Distributed Forwarding Cards (DFCs), IP multicast flows are Layer 3 switched locally using Multicast Distributed Hardware Switching (MDHS). MDHS uses local hardware CEF and replication tables on each DFC to perform La..

Distance Vector and Link State Routing Protocols

v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false 7.8 磅 0 2 false false false EN-US ZH-CN X-NONE ..

Using STUN

STUN provides the ability to emulate an SDLC circuit through an IP network. To simply connect two SDLC or two HDLC ports on different routers, you can use the following: Stun-A#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Stun-A(config)#interface Loopback0 Stun-A(config-if)#ip address 10.1.15.5 255.255.255.252 Stun-A(config-if)#exit Stun-A(config)#stun peer-name 10.1.15.5 Stun-A(config)#stun protocol-group 1 basic Stun-A(config)#inter..

Enabling Nonperiodic Updates

The ip rip triggered interface configuration command tells the router to only send those parts of the RIP database that have changed, instead of sending the entire database on each RIP update cycle: Router1#configure terminal Enter configuration commands, one per line.  End with CNTL/Z. Router1(config)#interface Serial0/0.2 Router1(config-subif)#ip rip triggered Router1(config-subif)#end Router1# Be sure to enable these nonperiodic "triggered" updates on the adjacent ro..