1% for CPU utilization? No Joke!
autostart = false
model = 3640
[localhost]
[[3640]]
image = c:\Users\dsudjima\Study\ios_dynamips\c3640-js-mz.124-19b.bin.image
workingdir = c:\Users\dsudjima\Study\dynamips_lab\rpvst\
ram = 128
slot0 = NM-1FE-TX
slot1 = NM-16ESW
slot2 = NM-16ESW
idlepc = 0x604f8144
Running on Intel Core Duo 1.83GHz 2GB RAM on Windows Vista 32-bit.
ip ospf area Command.Command ip ospf area can be used to simplify the configuration. The idea is that you don’t need to enable network area command yet you only need to explicitly enable ip ospf area per-interface basis and by this command your point-to-point network will be automatically advertised.
Let’s look at this example below.
rtr1 directly connected to rtr2 and each router has its own loopback address. OSPF area 1 is being used accross these routers and ospf network type is point-to-point.
Below is the result before the command ip ospf area being implemented.
rtr1#sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
20.20.20.20 0 FULL/ - 00:00:36 192.168.1.2 FastEthernet0/0
rtr1(config-if)#do sh ip route
Gateway of last resort is not set
20.0.0.0/32 is subnetted, 1 subnets
O 20.20.20.20 [110/2] via 192.168.1.2, 00:00:44, FastEthernet0/0
10.0.0.0/32 is subnetted, 1 subnets
C 10.10.10.10 is directly connected, Loopback0
192.168.1.0/30 is subnetted, 1 subnets
C 192.168.1.0 is directly connected, FastEthernet0/0
rtr2(config-if)#do sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
10.10.10.10 0 FULL/ - 00:00:37 192.168.1.1 FastEthernet0/0
rtr2#sh ip route
Gateway of last resort is not set
20.0.0.0/32 is subnetted, 1 subnets
C 20.20.20.20 is directly connected, Loopback0
10.0.0.0/32 is subnetted, 1 subnets
O 10.10.10.10 [110/2] via 192.168.1.1, 00:01:40, FastEthernet0/0
192.168.1.0/30 is subnetted, 1 subnets
C 192.168.1.0 is directly connected, FastEthernet0/0
And these are the results after command ip ospf area being implemented.
rtr1#sh run int f0/0
Building configuration...
Current configuration : 148 bytes
!
interface FastEthernet0/0
ip address 192.168.1.1 255.255.255.252
ip ospf network point-to-point
ip ospf 1 area 0
duplex auto
speed auto
end
rtr1#sh run | s router ospf
router ospf 1
log-adjacency-changes
network 10.10.10.10 0.0.0.0 area 0
rtr1#sh ip route
Gateway of last resort is not set
20.0.0.0/32 is subnetted, 1 subnets
O 20.20.20.20 [110/2] via 192.168.1.2, 00:25:13, FastEthernet0/0
10.0.0.0/32 is subnetted, 1 subnets
C 10.10.10.10 is directly connected, Loopback0
192.168.1.0/30 is subnetted, 1 subnets
C 192.168.1.0 is directly connected, FastEthernet0/0
rtr2#sh run int f0/0
Building configuration...
Current configuration : 148 bytes
!
interface FastEthernet0/0
ip address 192.168.1.2 255.255.255.252
ip ospf network point-to-point
ip ospf 1 area 0
duplex auto
speed auto
end
rtr2#sh run | s router ospf
router ospf 1
log-adjacency-changes
network 20.20.20.20 0.0.0.0 area 0
rtr2#sh ip route
Gateway of last resort is not set
20.0.0.0/32 is subnetted, 1 subnets
C 20.20.20.20 is directly connected, Loopback0
10.0.0.0/32 is subnetted, 1 subnets
O 10.10.10.10 [110/2] via 192.168.1.1, 00:26:13, FastEthernet0/0
192.168.1.0/30 is subnetted, 1 subnets
C 192.168.1.0 is directly connected, FastEthernet0/0
Source http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/ospfarea.html
During my time supporting a customer with big LAN contains hundreds of switches I’ve been told to hard set speed/duplex for each interface to reduce errors. Apparently this is not necessarily true. Hard-setting the speed/duplex won’t make the error go away.
Most internal LAN (access layer) has 10/100 and most of the problem often lies on bad cabling structure and not the interface itself.
Surprisingly, on 1GB interface auto-negotiation is a must due to
allow negotiation of master / slave PHY relationship for clocking at the physical layer. Without negotiation the line clock will not establish correctly and physical layers problems can result.
Greg Ferro posted a nice write-up about Autonegotiation on Ethernet – It Works, It Should Be Mandatory!
Today, I’m marking my day to start my CCIE journey. I will try to finish my written this year and head up for the lab next year.
My plan is quite simple, finish reading several books recommended by Cisco Press then do the written. Actually, I’m not even sure that I can finish all of those books by this year. However, at least I’ve made my mind that I am starting my journey. What happen next? I’ll see and observe.
I’m actually doing this because of my job commitment. I join this new company for project services and I will take my best to be meet the expectation. Almost all of my colleagues are CCIEs and one of the person I met has 2K CCIE number.
I believe this is the right time to make a commitment that I’m trying my best to fulfill the expectation even if I have to do it and learn it in a hard way.
I’m no match, at all, with those CCIEs. Even, it only takes one breakfast for them to do the job and for me will take breakfast, lunch, and dinner, I will do it!
I found these articles (CCIE R&S Syllabus, Part 1, CCIE R&S Syllabus, Part 2, and CCIE R&S Syllabus, Part 3) from Ethan Banks to help to get started. Arden Packeer and Himawan Nugroho are also have been my great inspirations to help me to realize that CCIE is just a mind game. A game about focus and time management while the skill will be the bonus.
I believe accepting this job and crafting my path to CCIE are a conscious commitment to increase my capacity. I believe that if I want to go further, I can use CCIE as one of the foundation.
I’ve been praying for this and talk it through with wife, over and over. I don’t know how many times I talk about this to her and she keeps listening and supporting. I need Him and I need her to make sure that I won’t stop ’till I win the prize.
You’ve all been to the stadium and seen the athletes race. Everyone runs; one wins. Run to win. All good athletes train hard. They do it for a gold medal that tarnishes and fades. You’re after one that’s gold eternally. 1 Corinthians 9:24-25 (The Message)
Let’s get busy!