EIGRP (NBMA: Multipoint): Neighbor command and Split horizon problem in NBMA

EIGRP is using multicast address 224.0.0.10 to automatically form neighborship among neighbours, however this nature can be changed by using the keyword neighbor. You will need to specify the address of your neighbor and instead of multicast. unicast is used to form neighborship. EIGRP will stop sending multicast packet on that surface. To manually add … Continue reading EIGRP (NBMA: Multipoint): Neighbor command and Split horizon problem in NBMA →

EIGRP: Route change

Refer to the diagram: To reach 10.1.1.1 R3 has to get to 10.0.0.1 as shown in traceroute: R3#traceroute 10.1.1.1 Type escape sequence to abort. Tracing the route to 10.1.1.1 1 10.0.0.1 0 msec 0 msec * R3# R3#ping 10.1.1.1 repeat 100000 I will shut down R1's fa0/0 and see if the there were any lost. … Continue reading EIGRP: Route change →

EIGRP: Bandwidth Part2

R1#sh interfaces serial 0/0 Serial0/0 is up, line protocol is up Hardware is PowerQUICC Serial Description: This is a DCE to R2 Internet address is 10.0.1.1/24 MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation HDLC, loopback not set Keepalive set (10 sec) Last input 00:00:06, output 00:00:05, … Continue reading EIGRP: Bandwidth Part2 →

EIGRP: Configuration and verification part1.1

*Mar 2 11:52:53.472: EIGRP: Received HELLO on Loopback1 nbr 10.1.1.1 *Mar 2 11:52:53.472: AS 100, Flags 0x0, Seq 0/0 idbQ 0/0 *Mar 2 11:52:53.472: EIGRP: Packet from ourselves ignored I made R1 advertise the route of the loopback1 interface, hello from loopback1 is ignored. R1#sh ip eigrp interfaces 100 IP-EIGRP interfaces for process 100 Xmit … Continue reading EIGRP: Configuration and verification part1.1 →

EIGRP: Configuration and verification Part1

Scenario: You are tasked to configure EIGRP routing among various departments. Loopback1 of R1 is Engineering, loopback2 of R2 is Marketing, loopback3 of R3 is Sales. All physical connections have already been installed as shown in this logical network diagram. You do not need to configure anything on the switch. The switch has a localized … Continue reading EIGRP: Configuration and verification Part1 →

EIGRP Objective 1

EIGRP Objective 1 by Cyrus Lok on Sunday, September 5, 2010 at 5:43pm Background: MTA stands for Megasource TechnoActive, a new startup system integrator that provide wide area network solutions, home office solution, enterprise infrastructure maintenance, process network solution, process network maintenance, network security services...etc You are hired as a network engineer by MTA, recently … Continue reading EIGRP Objective 1 →