Hardware queue Packets can be sent trough hardware queue without interrupting CPU Always uses FIFO logic Cannot be affected by IOS queuing tools Class Based Weighted Fair Queing Every class (queue) gets a defined percentage/amount of bandwidth If a class
IPv6 – notes
Addresses are 128 bits long Separated with colons every 16 bits Address separated in prefix and interface id, most common is /64 Leading zeroes can be omitted from address and double colon may be used to represent Successive zeroes, may
MPLS – notes
First defined in RFC 2547 Originally called tag switching and was Cisco proprietary MPLS is the open standard Operates at layer 2.5 between switching and routing Terms used in MPLS: LER = Label Edge Router – MPLS capable, placed at
150 hours done
I’m finishing up on MPLS, will be finished in a day or two and then I will put up some notes. I reached 150 hours today. Written exam is about two or three months away I think before I am
Starting MPLS
Finished BGP yesterday and I’m now moving on to MPLS. I have read the certification guide and now I’m going to read MPLS and VPN architectures by Pepelnjak.
Border Gateway Protocol (BGP) – notes
Uses TCP as transport, port 179 Path vector protocol Checks before becoming a neighbor The TCP connection request must come from an IP associated with a neighbor command The AS number must match that in the neighbore statement The routers
BGP almost done
I’m 3/4 done with Halabis book Internet routing architectures. It’s one of the best books out there and a recommended read for ayone wanting to learn some serious BGP. When done with BGP I will probably move on to MPLS.
Enhanced Interior Gateway Protocol (EIGRP) – notes
Cisco proprietary Uses IP protocol 88 as transport Support for MD5 authentication (no clear text) Sends updates to 224.0.0.10 Distance vector but has some link state like features Timers Uses a hello and a hold timer. Neighbors discovered via hello
OSPF – Open Shortest Path First (notes)
Defined in RFC 2328 Supports VLSM and CIDR Is a link state protocol Uses a link state database (LSDB) for topology information, identical within area Reliable flooding of LSAs Uses hello protocol to build adjacencies Runs directly over IP,
100 hours reached
So I hit a milestone this week, I’ve done about 100 hours of study so far which means I’m at perhaps 10% of the time needed to get the IE. Work has been really busy but trying to get a