Foundation Summary 203
Table 6-6
IP Routing Protocols
Protocol
Type
Updates
Metric
Comments
RIP V1
Distance-
vector (IGP)
30 seconds
Hops (limited to 15)
Best for small networks.
Supported by most network
operating systems. Does not
support variable-length
subnet masking.
RIP V2
Distance-
vector (IGP)
30 seconds
Hops (limited to 15)
Second-generation RIP.
Improvements beyond RIP
include the support of
variable-length subnet
masking.
OSPF
Link-state
(IGP)
Triggered when
there is a
network change
Cost = 10
8
/BW
Contains a link-state
database. Uses link-state
advertisements to announce
network information.
IGRP
Hybrid (IGP)
90 seconds
Bandwidth
Delay
Reliability
Load
MTU
A Cisco proprietary protocol
that contains link-state and
distance-vector features.
Does not support variable-
length subnet masking.
EIGRP
Hybrid (IGP)
Triggered when
there is a
network change
Bandwidth
Delay
Reliability
Load
MTU
Second-generation IGRP.
Improvements beyond IGRP
include support of variable-
length subnet masking and
faster convergence time.
BGP
Path-vector
(EGP)
Triggered when
there is a
network change
Cost
Concerned with
interconnecting autonomous
systems, primarily on the
Internet.
87200333.book Page 203 Wednesday, August 22, 2001 2:37 PM