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 [...]
Archive for the ‘Cert Guide Notes’ Category
RIP
Posted in Cert Guide Notes, tagged ccie, odom, rip on June 15, 2008 | Leave a Comment »
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, [...]
Chapter 17: IP Multicast Routing
Posted in Cert Guide Notes, tagged auto RP, multicast, pim, pim-dm, pim-sm on June 15, 2008 | Leave a Comment »
Chapter 17: IP Multicast Routing
Mcast using Dense Mode
instructs the router to forward the multicast traffic on all the configured interfaces, except not forwarding out the interface on which it was received.
DM [...]
Chapter 16: Intro to IP Multicast
Posted in Cert Guide Notes, tagged ccie, igmp, multicast, odom on June 15, 2008 | Leave a Comment »
Chapter 16: Introduction to IP Multicast
All hosts that are connected to a LAN must use a standard method to calculate a L2 multicast address from the L3 multicast address and assign it to their NICs.
IGMP [...]
CCIE Cert Guide — QoS Notes Part I
Posted in Cert Guide Notes, tagged ccie, cert guide, mqc, odom, qos on June 1, 2008 | Leave a Comment »
QOS:
IP header has 1-byte fields called the TOS. It’s HIGH ORDER 3 bits are defined as IPP field.
Diffserv renamed TOS byte to DS field and IPP was replaced with a 6 bit field called DSCP. [...]
