Friday, August 8th, 2008 |
I arrived on the atfor center at 1:35pm, has my test was @2pm. Take the time to complete and sign the VUE paper, put my stuff on the safety box and switch off my cell phone. Coffee for free (delicious !) and nice people, I start the exam with 170min ( +20min because I am French).
I remember the first time I passed the exam, it was the beta in December 06, It was hard but definitely makable.
Bottle of water, Kinder bueno, Chocolaté Coffee and I run baby. I felt confident on most of the topics , QoS was not my favorite section, and stick once for like more that 15min for 1 QoS question ! The CCIE Written exam is different from the CCXA and CCXP, has you can go back, mark you question, So it was REALY good to move forward and let the complicated question at the end. I recheck twice my marked question and re-read again all question. I take me 2h10 to finish.
Cisco certification give the score at the end, and I can tell you that the time between you press the finish button and the result, seem to be hours ! I saw the “Felicitation” , close my eyes, smile and say in my head “the game has just begun”
Posted in CCIE Written | 7 Comments »
Friday, May 16th, 2008 |
Things turned in another way, family duty and new job took me all the time that I supposed to use for the written exam, so I’ll move my exam to another date, Thinking after the summer.
I am feeling good with the layer 2 technologies, ospf and some BGP concepts, and still continue to learn on multicast and QoS.
I’ve been reading many ccie’s blogs, and friend’s micro-blogging that’s help me to keep an eye’s on the Cisco news.
Posted in CCIE Written | No Comments »
Sunday, December 16th, 2007 |
Notes takes during my layer 2 reading.
Cross-over cable ( T568A ) : KeY pins 1-3; 2-6
E1 Cable : Key pins : 1-2;4-5
Auto-MDX allow to use the wrong cable ( bot all cisco switch models)
Switches are on auto-negotiation mode ( auto-determine speed and duplex ), use FLP (Fast Link Pulse) to “detect speed”, if auto-nego is disabled, half-duplex will be used.
CSMA/CS define how to retransmit frame when collision happen.
1 port on a switch = 1 domain collision
802.3u IEEE standard for Fast-Ethernet (100 Mbps)
802.3z IEEE standard for Giga-Ethernet (1 Gbps) over copper or fiber
802.3ab IEEE standard for Giga-Ethernet (1 Gbps) over UTP
UTP cat 5/5e/6 = 1Gbps(4 pairs) and 100m
Funny thing is that when you try to translate “copper cabling”, on Google translator, to french, it show “Livebox” … ^^
Switches stuff :
Switches does :
Learn MAC address from examining the source Mac address.
Decide of Forwarding/Filtering frames based on destination Mac address
Loop-free on multiple bridged environment via the Spanning-Tree Protocol.
3 switch method :
Store n forward : Check the FCS for error-free frames.
Cut-through: Low latency mode, first bits send before the final bits get received.
Fragment-free: Like cut-through, but check the first 64 bytes before forwarding, prevent error due to collision.
Definition: Auto-negotiation, half duplex, cross-over cable, straight-through cable, unicast, multicast and broadcast address, loopback cour-circuitry, I/G Bits, U/L Bit, CSMA/CD
Vlan/Trunk stuff
On 1 vlan = 1 broadcast domain.
Vlan is an administrative subnetting on the switches ports .
best practice 1 vlan with 1 subnet, but can multiples subnet within 1 vlan.
Forwarding frames on different Vlan ( inter-vlan routing) , use routers or MLS (Multi Layer Switch).
ISL vs 802.1Q : Both use 12 of the 15 bits VLAN ID Field ( ISL use to deal with 10bits ) so then support extended range ( 1006-4094 not stored vlan.dat), ISL Encapsule the entire frame (26 byte header + 4 byte CRC as tail), 802.1Q insert tag ( frame tagging , 4 bytes )
Trunk support vlan 1-4094
VTP: Cisco’s method to distribute VLAN configuration.
VTP Option: domain, password, mode, version, pruning, interface.
VTP Modes : Server, Client, Transparent and Off ( only on CatOS)
To use extended vlan ( 1006-4094 ), switches vtp configuration need to be in transparent mode.
Good reading for VTP here .
DTP, Dynamic Trunk Protocol : Detect trunk and witch protocol use. ( on desirable mode => ISL as default ) via the switchport mode command line
DTP modes:
Access : Forces the port into a permanent non-trunk mode.
Trunk : Forces the port into a permanent trunk mode and negotiates with the connected device on the other side to convert the link to trunk mode.
Auto : The port becomes a trunk port if the neighboring port is in a Trunk or Desirable mode. This is the default mode.
Desirable : The port attempts to become a trunk port if the neighboring port is in a Trunk , Desirable or Auto mode.
NoNegotiate : The port becomes a trunk port but does not use DTP
802.1Q-in-Q Tunneling : Allow to preserve 802.1q tags over a WAN.
Definition : VLAN, Broadcast domain, DTP, VTP Pruning, 802.1Q, ISL, Native VLAN, encapsulation, pVlan, Promiscuous port, community VLAN, isolated VLAN, 802.1Q-in-Q, Layer 2 protocol tunneling.
Posted in CCIE Notes, CCIE Written, Lan | No Comments »
Well, I still have to work QOS and Multicast ….
Based on the 