Rip Cheat Sheet

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RIP
packetlife.net
RIP Implementations
Attributes
RIPv1
Type
Distance Vector
Original RIP implementation, limited to classful routing
Algorithm
Bellman-Ford
(obsolete)
Admin Distance
120
RIPv2
Introduced support for classless routing, authentication,
Metric Hop count (max 15)
triggered updates, and multicast announcements (RFC 2453)
Standard
RFCs 2080, 2453
RIPng (RIP Next Generation)
Protocols
IPv4, IPv6
Extends RIPv2 to support IPv6 routing (RFC 2080); functions
very similarly to RIPv2 and is subsequently as limited
Transport
UDP
Protocols Comparison
Authentication
Plaintext, MD5
RIPv1
RIPv2
RIPng
Multicast IP
224.0.0.9/FF02::9
IP
IPv4
IPv4
IPv6
Terminology
Admin Distance 120
120
120
Split Horizon
UDP Port 520
520
521
A rule that states a router may not advertise a route
back to the neighbor from which it was learned
Classless No
Yes
Yes
Route Poisoning
Adv. Address Broadcast
224.0.0.9
FF02::9
When a network becomes unreachable, an
update with an infinite metric is generated to
Authentication None
Plain, MD5
None
explicitly advertise the route as unreachable
RIPv2 Configuration
Poison Reverse
A router advertises a network as unreachable
! Enable RIPv2 IPv4 routing
through the interface on which it was learned
router rip
version 2
Timer Defaults
! Disable RIPv2 automatic summarization
Update
30 sec
Flush
240 sec
no auto-summary
Invalid
180 sec
Hold-down
180 sec
! Designate RIPv2 interfaces by network
RIPv2 Interface Configuration
network network
! Identify unicast-only neighbors
! Configure manual route summarization
neighbor IP-address
ip summary-address rip network mask
! Originate a default route
! Enable MD5 authentication (RIPv2 only)
default-information originate
ip rip authentication mode md5
ip rip authentication key-chain key-chain
! Designate passive interfaces
passive-interface {interface | default}
RIPng Interface Configuration
! Modify timers
! Enable RIPng on the interface
timers basic update invalid hold flush
ipv6 rip name enable
RIPng Configuration
! Configure manual route summarization
ipv6 rip name summary-address prefix
! Enable IPv6 routing
ipv6 unicast-routing
Troubleshooting
show ip[v6] protocols
! Enable RIPng IPv6 routing
ipv6 router rip name
show ip[v6] rip database
! Toggle split-horizon and poison-reverse
show ip[v6] route rip
[no] split-horizon
debug ip rip { database | events }
[no] poison-reverse
debug ipv6 rip [interface]
! Modify timers
timers basic update invalid hold flush
by Jeremy Stretch
v1.1

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