These are awesome!
http://www.ipexpert.com/index.cfm/a/p/vlectures
also, have a look at Mike Down’s blog, he has some cool discounts!
http://mdownipexpert.blogspot.com/
Archive for June, 2008
vLectures by IpExpert
Posted in ipexpert, tagged ipexpert on June 21, 2008 | 1 Comment »
RIP
Posted in Cert Guide Notes, tagged ccie, odom, rip on June 15, 2008 | Leave a Comment »
RIP
UDP port 520 is used for transport.
RIPv2 uses 224.0.0.9 for multicast
Update interval is 30 seconds.
RIP v2 allows RIP to tag routes as they are distributed into RIP.
Next Hop fields: supports [...]
IP Forwarding
Posted in Cert Guide Notes, tagged ip forwarding, odom, policy routing on June 15, 2008 | Leave a Comment »
IP Forwarding:
before creating a new frame, the router updates the IP header TTL filed requiring a recomputation of the IP header checksum.
Frame Relay Inverse Arp:
With InArp, routers already know the DLCI and need [...]
IP Services: Syslog, WCCP, ICMP
Posted in Cert Guide Notes, tagged icmp, syslog, wccp on June 15, 2008 | 1 Comment »
SYSLOG:
uses UDP port 514
use, logging <host> command and optionally, logging trap.
default facility of local7
e.g: “service timestamps log datetime localtime” à logging 192.168.1.100 à logging monitor informational.
WCCP:
· uses UDP port 2048
· [...]
IP Services: NTP, SNMP
Posted in Cert Guide Notes, tagged ntp snmp on June 15, 2008 | Leave a Comment »
NTP:
NTP server: (global) ntp master 7 ß stratum 7
NTP symmetric active mode: router/switch mutually synchronizes with another NTP host, configured with ntp peer command. (global) ntp peer 10.1.1.1
NTP broadcast client: [...]
IP Services: ARP, RARP, DHCP, BOOTP
Posted in Cert Guide Notes, tagged arp, bootp, dhcp, rarp on June 15, 2008 | Leave a Comment »
ARP and Proxy Arp:
method to learn another hosts MAC address
all 0’s in des MAC
ARP protocol type: 0×0806
Proxy Arp: if a router can route packet to the target host in another subnet, [...]
IP Services: HSRP, VRRP, GLBP
Posted in CCIE notes, tagged glbp, hsrp, vrrp on June 15, 2008 | Leave a Comment »
HSRP:
sends it’s multicast hello messages to 224.0.0.2 (all routers) UDP port 1985
Primary router with the highest configured priority will act as a virtual router with its own IP and MAC address.
single router, elected from the [...]
IP Services — NAT
Posted in CCIE notes, tagged nat on June 15, 2008 | Leave a Comment »
NAT:
Inside Local Address (inside the enterprise): normal inside address (from private address pools). Addresses not advertised to the outside.
Inside Global Address (inside the enterprise): legitimate IP address representing one or more inside local IP address to the outside world. “Real” address that gets translated into one or more outside local addresses. Addresses by which [...]
