CCDA 640-864 Summary Notes – Chapter 3 – Day 6

Server Connectivity Options Single NIC (FE GE Full duplex + No redundancy) Dual NIC Etherchannel - redundancy Dual NIC to separate access - redundancy Content switching - redundancy + load balancing per user request Enterprise Data Center Port density for servers Low latency layer 2 Suport both single and dual connected servers Aggregation (Distribution) Layer … Continue reading CCDA 640-864 Summary Notes – Chapter 3 – Day 6 →

CCDA 640-864 Summary Notes – Day 5

LAN Hardware Repeaters Layer 1 device Connects separate segments Do not control broadcasts or collision domains Forward frames out all other interfaces Protocol transparent understands bits Amplify the signals 5-4-3 Rule: The maximum path between two stations on the network should not be more than five segments, with four repeaters between those segments, and no more than … Continue reading CCDA 640-864 Summary Notes – Day 5 →

CCDA 640-864 Summary Notes – Day 4

IEEE 802.3-2002 (Ethernet Standards) Design Rules Round trip propagation delay should be less than 512-bit times in one collision domain. Max for 10 Mbps - 51.2 microseconds. Max for 100 Mbps - 5.12 microseconds 10 Base 5 No longer used Max segment = 500 m Max collision domain = 2500m of 5 segments Has a maximum diameter … Continue reading CCDA 640-864 Summary Notes – Day 4 →

CCDA 640-864 Summary Notes – Day 3

Hierarchical Network Models Advantages Cost savings Ease of understanding becausee of simple design and lower management costs as monitoring systems are distributed. Network growth as changes are contained to a small subset of the network and only impact that small area Easy to isolate a problem in the network if the hierarchial model is used … Continue reading CCDA 640-864 Summary Notes – Day 3 →

Summary Notes: JUNOS as a second Language

Differences between IOS and JUNOS. 1) JUNOS can be managed using the following options: CLI - Console, SSh and Telnet J-Web SNMP Junoscope Junos Script API NETCONF API SDX Service Deployment System 2) Using pipe show interfaces terse show interfaces terse | match se-3 show interfaces terse | except fe- show interfaces terse | count … Continue reading Summary Notes: JUNOS as a second Language →

Aruba 3200XM – Initial Configuration – Part 1

Got a larger toy 🙂 Initialization Wizard via Console Loading image 0:0############################################################################################################################################################################################################################################################################################################## Image is signed; verifying checksum... passed Signer Cert OK Policy Cert OK RSA signature verified. Booting image... Uncompressing core image files... 00:00:07 done. 00:00:42 Aruba Networks ArubaOS Version 6.1.3.6 (build 36470 / label #36470) Built by p4build@corsica.arubanetworks.com on 2012-12-11 at 12:51:05 PST (gcc … Continue reading Aruba 3200XM – Initial Configuration – Part 1 →

Day out with Aruba Controller 620 – Initial Configuration – Part 1

Playing around with my new toy 🙂 Just trying to find out what the Controller supports: Number of APs supported (Aruba620) #show license-usage ap AP Licenses ----------- Type Number ---- ------ AP Licenses 4 Overall AP License Limit 4 AP Usage -------- Type Count ---- ----- CAPs 0 RAPs 0 Tunneled nodes 0 Total APs … Continue reading Day out with Aruba Controller 620 – Initial Configuration – Part 1 →

Aruba 620 Controller Factory Reset

Doesn't it feel good starting on a clean slate...! Oh well, at least for Networking devices 🙂 Erase it all... (Aruba620) #write erase all Switch will be factory defaulted. All the configuration and databases will be deleted. Press 'y' to proceed : Write Erase successful Reload (Aruba620) #reload Do you really want to restart the … Continue reading Aruba 620 Controller Factory Reset →

Aruba 620 Controller Password Recovery

The worst part about having to configure old appliances is the fact that most of the times, you are faced with having to do password recovery! This is basically the best password recovery that I have ever done :). How I wish other vendors can adopt such a scheme... Oh well, Aruba has just impressed … Continue reading Aruba 620 Controller Password Recovery →

JNCIA Summary Notes – Day 2

JUNOS software Naming Example: jbundle-5.2R1.4-domestic-signed.tgz jbundle - package (jbundle, jroute, jpfe) 5.2 - Major version R - Stage (R - publicly released, A - Alpha version , B - Beta Version, I - Internal Test version) 1.4 - released_version domestic - type ( domestic contains jcrypto, expo does not) signed - package is protected with md5 … Continue reading JNCIA Summary Notes – Day 2 →