tag:blogger.com,1999:blog-9141792135548071322011-11-28T11:35:11.938+11:00A journal jotting my attempts in the process of becoming a CCIE, including interesting things in my life.Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.comBlogger231100tag:blogger.com,1999:blog-914179213554807132.post-13879584718346378152009-09-21T17:03:00.007+10:002009-09-21T17:57:48.018+10:00

(Dynamips (IOS ) and Olive (JunOS) together)http://inetpro.org/wiki/Using_QEMU_with_Olive_to_emulate_Juniper_RoutersI installed Olive on Ubuntu 8.04 64Bit using the above guide. Couple of straight forward instructions. The only thing you'd change is if you are using Xwindows to do the installation, you might not want to use the -curses option in the Installing Olive SectionAlso you need have

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com2tag:blogger.com,1999:blog-914179213554807132.post-28461670340739792932009-09-19T11:24:00.005+10:002009-09-21T17:12:12.832+10:00

Recently I installed JunOS on vista. I followed instructions given inhttp://brokenpipes.blogspot.com/2008/01/olive-is-alive.html-The only change I had to make was to STEP 7, i.e instead of using Qemu command to boot FreeBSD from iso, which caused Qemu to crash. I used jemu.-Make sure your FTP transfer is in binary mode.

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-12640112254168709902009-04-29T15:20:00.003+10:002009-04-29T15:31:21.828+10:00

I am on the IE version 1 volume 1 QOS (last section). My notebook is almost finished that I had to get new ones yesterday. In case you're wondering I like to have my notes written on paper. This particular volume covers a lot of Legacy QOS technologies, which I have familiarized myself with now. In addition, it also has very interesting tests to verify configurations related to QOS. I should say

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-23648470111623777732009-04-13T22:49:00.003+10:002009-04-13T22:54:15.317+10:00

I was a bit bored with my labs and I decided to digress for a while. I ended up taking the course "JUNOS as a second language". I found it quite interesting.http://www.juniper.net/us/en/training/elearning/jsl.html

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com2tag:blogger.com,1999:blog-914179213554807132.post-84354744526693330542009-04-09T17:13:00.009+10:002009-04-09T17:24:16.898+10:00

I finished all the cabling and installation of quad NICs. Luckily, Ubuntu automatically detected all the quad NICs without crying for drivers. It would have been real mess without cable ties. Remember to verify whether your dynamips router's physical interface goes to correct switchport on the real switch through the show cdp neighbors command.

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-71938676632845233382009-04-03T10:35:00.005+11:002009-04-06T21:50:35.361+10:00

Since I am running a full scale dynamips lab, I decided to connect dynamics to real switches. I'll be using 4x3550, with 3x quad port NICs. I will do a couple rented rack sessions to familiarize myself with features specific to 3560.Initially when I decided to go for quad port NICs after foraying through myriad forums, I realised most of the quad NICs were PCI cards. And this posed to be a huge

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-959872790554696992009-03-21T10:49:00.009+11:002009-04-06T21:50:35.361+10:00

As I mentioned before, I have started working on IE work books. However, as soon as I ran the complete topology (no IGP, BGPetc) , with minimal configuration on non backbone routers, CPU utilization on an average was 55% and 30% for the two dynamips processes. Yesterday I decided to give a test once again with different idlepc values, and voila it has reduced CPU usages to 14% and 12% for the two

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-33262559996651155202009-03-08T23:20:00.007+11:002009-03-08T23:36:12.435+11:00

I passed the CCIE written last week. My preparation included reading all the books I mentioned before in the reading list. I have also purchased Internet Routing Architectures (Sam Halabi), left with 2 more chapters.Some other preparation materials would includeResolving and going through topics in Cisco Netpro Forum, GroupStudy and different CCIE blogs (especially Internetwork Expert ). I have

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-28207533920870555232009-02-03T20:04:00.007+11:002009-04-06T21:52:30.590+10:00

I was reading through various resources on DMVPN, just thought I'd post those here.http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/DMVPN_1.htmlhttp://blog.internetworkexpert.com/2008/08/02/dmvpn-explained/http://packetlife.net/blog/2008/jul/23/dynamic-multipoint-vpn-dmvpn/http://www.faqs.org/rfcs/rfc2332.html

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-57126651599537251042009-01-14T09:13:00.004+11:002009-03-21T16:54:07.698+11:00

I finally registered for CCIE R&S written, to be held the end of next month. I am also on the last book of my reading list, Implementing IPv6. I could describe the moment as both exciting and trembling. It's the effort of several months of preparation and now there's no turning back.

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-29780469499990630522008-12-27T00:30:00.003+11:002009-04-06T21:51:43.108+10:00

When packets pass through a VPN, the original IP header is encapsulated. For eg, in case of GRE tunnel, GRE is the encapsulation protocol and IP becomes the passenger protocol, ofcourse using IP again as the transport protocol.Original Packet IP TCP Data After entering the VPN tunnel

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-83600746829293658762008-12-24T22:39:00.005+11:002009-03-22T23:28:19.524+11:00

Requirements1) R1 only accepts connections from 172.30.1.0/24 network2) R2 sees R1 only as 192.168.1.0/24 node (i.e 192.168.1.200)First starting with basic interface configsR2#sh run int f0/23Building configuration...Current configuration : 89 bytes!interface FastEthernet0/23no switchportip address 192.168.1.104 255.255.255.0endR1#sh run int e0Building configuration...Current configuration :

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-14213167200804580872008-12-19T21:46:00.003+11:002009-03-22T23:29:29.517+11:00

Well, at present I am reading Cisco QOS Exam certification guide. Previously, I had not bought Internet Routing Architectures, the definitive guide to BGP. I couldnt do without it, also I realised by reading that I am somewhere there to the SP track. Well, I guess I am getting ahead of myself here (havent even finished R&S and there he goes talking about SP). My love for MPLS and other service

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-87768806771131063192008-11-29T16:49:00.010+11:002009-04-06T21:51:07.338+10:00

MPLS (Multiprotocol Label Switching) offers Layer 3 VPN services by means of MPLS core provider network. MPLS VPNs make use of another MPLS application namely MPLS unicast IP routing in the MPLS backbone. For enabling an MPLS core backbone, all routers including PE must support LDP (Label Distribution Protocol) and CEF (Cisco Express forwarding).The essential parts of MPLS VPN areProvider Router

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com1tag:blogger.com,1999:blog-914179213554807132.post-90899771703236645732008-11-08T12:04:00.011+11:002009-04-06T21:53:14.332+10:00

In this tutorial, I'd like to go through some elementary concepts of mutual redistribution. Redistribution is process by which the routes learnt by one routing protocol are injected into another routing protocol. These routes could be connected or static as well. An example would an organization having to run various routing protocols. In the topology below, OSPF is running for one half of the

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-22444054068233194232008-10-26T20:35:00.007+11:002008-11-08T12:22:42.429+11:00

I am quite content running labs on Dynamips until I purchase all the equipments in Jan. So far, I have completed reading CCIE R&S certification guide. At present, I am reading Routing TCP/IP Vol 1. I can safely say the more you read and try out labs, its like joining pieces of a large puzzle. You can make co-relations between different entities and couple of what if scenarios start appearing.

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-32129421272940704352008-10-01T10:31:00.008+10:002009-04-06T21:52:30.590+10:00

I am extremely elated to share the good news on my Dynamips test, i.e Internetwork Expert Toplogy . I have got my CPU usage close to 38% - 46%. I had earlier reported my disappointment in not being able to reduce processor utilization below 70%- 80% And here comes the tip of the day to reduce CPU usage.Below are System Specs OS :Ubuntu 8.04 64 Bit Processor : Intel Core 2 Duo Processor

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-18402160231394176572008-09-30T08:55:00.002+10:002009-04-06T21:53:37.737+10:00

So far no luck, my cpu is still running at 70-80% when I run 11 devices. I'll probably run some more tests this weekend to see if I can bring that down. However, I am still planning to buy equipments of ebay as I have bought 60% already.I'd use dynamips as a platform to simulate scenarious on devices, which ofcourse are too expensive to afford. I have also completed 20% of my reading. I must say

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-55980854063565089742008-09-27T09:53:00.020+10:002009-04-06T21:50:18.338+10:00

Finally I got my hands on Dynamips. I decided to run it on Ubuntu 8.04 64bit. After installing Ubuntu 64bit on my Toshiba A300/U01, I ran into a couple of problems with my RealTek network card not being detected correctly. However this issue had already been solved and I was able to fix it using the following link.http://www.jamesonwilliams.com/hardy-r8168.htmAfter getting my network card to

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com1tag:blogger.com,1999:blog-914179213554807132.post-12916818850183966172008-09-20T20:04:00.025+10:002008-09-29T08:24:33.008+10:00

I just got a Toshiba Satellite A300/U01 on Friday. The funny part is, I had made up mind on getting the A300/CO1 ($1799) . However, when I reached the store, I was told it was no longer in stock. But of course, they had the A300/U01 ($1899). I was about to leave thinking it was above my budget, anyway, I told the guy at the store, "The A300/U01 is a bit too expensive for me, if you could it give

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-41378054813463479142008-09-20T19:39:00.007+10:002008-09-29T08:18:19.152+10:00

Well I have been so busy with work lately and that raises the question "Who isnt?". We recently upgraded our distribution switch, chucked the Nortel Baystack and replaced it with Cisco Cat-3550. It is now responsible for routing Inter VLAN traffic in our office.The good part about the upgrade was eliminating all of the "router on a stick" configuration for many of VLANs in place. Apparently, it

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-46172346371297519362008-08-31T19:29:00.007+10:002009-04-06T21:52:46.226+10:00

In this post, I'll take some time to mention the books necessary to brush your concepts. For R&S, I would highly recommend the following.1) CCIE Routing And Switching Exam Certification Guide Third Edition2) Routing TCP/IP Volume I3) Routing TCP/IP Volume II4) Cisco LAN Switching5) Cisco QoS certification Guide6) Developing IP Multicast Networks7) Cisco Self-Study: Implementing Cisco IPv6

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0tag:blogger.com,1999:blog-914179213554807132.post-58558271412076996832008-08-31T12:23:00.002+10:002008-09-29T08:20:22.237+10:00

I am currently preparing for my CCIE (R&S). Unlike a lot of other networking professionals out there, I havent had a lot of industry experience, although I an beginning to absorb quite a lot in my current role.The first question that came to my mind when I began preparing for the CCIE was, why should I even think about doing it now, when I havent had a lot of industry exposure. To me, its more

Lejoehttp://www.blogger.com/profile/10925750189493365242noreply@blogger.com0