Posted in CCIE notes, tagged Narbik, ospf on April 5, 2009 | 1 Comment »
Lab 4 (summarization):
External routes are summarized on ASBR using “summary-address” command.
when summarizing internal routes on ABRs, the “area xx range” command must be used with xx is the area id. The routes that are being summarized [...]
Posted in CCIE notes, tagged ipexpert BLS on July 30, 2008 | Leave a Comment »
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 [...]
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 [...]
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
· [...]
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: [...]
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, [...]
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 [...]
