Is-Is Cheat Sheet Page 2

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IS-IS
P
2
ART
packetlife.net
TLV Types
Name
Use
Name
Use
Name
Use
1 Area Addresses
Hello, LSP
6 IS Neighbors
Hello, L2 LSP
128 IP Internal Reach.
LSP
2 IS Neighbors
LSP
8 Padding
Hello
129 Protocols Supported
Hello, LSP
3 ES Neighbors
L1 LSP
9 LSP Entries
SNP
131 IDRPI
SNP, L2 LSP
5 Prefix Neighbors
L2 LSP
10 Authentication All
132 IP Interface Address
Hello, LSP
Configuration Example
Area 1
Router A2
192.168.1.0/24
interface FastEthernet0/0
description Area 1
ip address 192.168.1.2 255.255.255.0
ip router isis
A3
A2
isis circuit-type level-1
!
router isis
A1
net 49.0001.0000.0000.00a2.00
Router B2
Area 3
Area 2
interface FastEthernet0/0
192.168.3.0/24
192.168.2.0/24
description Area 2
ip address 192.168.2.2 255.255.255.0
ip router isis
isis circuit-type level-1
B2
C2
!
10.0.0.8/30
C1
B1
router isis
net 49.0002.0000.0000.00b2.00
B3
C3
Router A1
Router B1
interface FastEthernet0/0
interface FastEthernet0/0
description Area 1
description Area 2
ip address 192.168.1.1 255.255.255.0
ip address 192.168.2.1 255.255.255.0
ip router isis
ip router isis
isis circuit-type level-1
isis circuit-type level-1
!
!
interface Serial1/0
interface Serial1/0
no ip address
no ip address
encapsulation frame-relay
encapsulation frame-relay
!
!
interface Serial1/0.1 point-to-point
interface Serial1/0.1 point-to-point
description To Area 2
description To Area 1
ip address 10.0.0.1 255.255.255.252
ip address 10.0.0.2 255.255.255.252
ip router isis
ip router isis
isis circuit-type level-2-only
isis circuit-type level-2-only
! MD5 authentication (keychain not shown)
! MD5 authentication (keychain not shown)
isis authentication mode md5
isis authentication mode md5
isis authentication key-chain <keychain>
isis authentication key-chain <keychain>
frame-relay interface-dlci 101
frame-relay interface-dlci 101
!
!
interface Serial1/0.2 point-to-point
interface Serial1/0.2 point-to-point
description To Area 3
description To Area 3
ip address 10.0.0.5 255.255.255.252
ip address 10.0.0.9 255.255.255.252
ip router isis
ip router isis
isis circuit-type level-2-only
isis circuit-type level-2-only
frame-relay interface-dlci 102
frame-relay interface-dlci 103
!
!
router isis
router isis
net 49.0001.0000.0000.00a1.00
net 49.0002.0000.0000.00b1.00
by Jeremy Stretch
v2.0

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