Oda030007,5 is-Is Configuration Issue1.4

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ODA031007 IS-IS Configuration

ISSUE 1.4

HUAWEI TECHNOLOGIES CO., LTD. Page 2All rights reserved

This slides will introduce IS-IS routing

protocol configuration command, typical

case, debugging and troubleshooting.


Upon completion of this course, you

will be able to:

Know the basic configuration of IS-

IS

Know the debugging and

troubleshooting of IS-IS


Chapter 1 IS-IS Basic ConfigurationChapter 1 IS-IS Basic Configuration

Chapter 2 IS-IS Advanced ConfigurationChapter 2 IS-IS Advanced Configuration

Chapter 3 IS-IS Debugging And Chapter 3 IS-IS Debugging And

TroubleshootingTroubleshooting


Simple IS-IS Configuration

isis network-entity 49.0001.0000.0000.0001.00#interface Serial2/0 link-protocol ppp ip address 10.1.1.1 255.255.255.252 isis enable#interface LoopBack0 ip address 1.1.1.1 255.255.255.255 isis enable

.1.2

10.1.1.0/30

Loopback 01.1.1.1/32


Area-ID 49.0001

isis network-entity 49.0001.0000.0000.0002.00#interface Serial2/0 link-protocol ppp ip address 10.1.1.2 255.255.255.252 isis enable#interface LoopBack0 ip address 2.2.2.2 255.255.255.255 isis enable

RTARTB


Check the result

<RTA>display isis peer System ID Interface Circuit ID State HoldTime Type Pri0000.0000.0002 Serial2/0 001 Up 22s L12 0

<RTA>display isis lsdb IS-IS Level-1 Link State Database Lsp ID Sequence Holdtime A_P_O Checksum >0000.0000.0001.00-00 0x00000003 880 0_0_0 0xa1bf 0000.0000.0002.00-00 0x00000003 886 0_0_0 0x95c2 IS-IS Level-2 Link State Database Lsp ID Sequence Holdtime A_P_O Checksum >0000.0000.0001.00-00 0x00000004 880 0_0_0 0x0fa7 0000.0000.0002.00-00 0x00000004 885 0_0_0 0xf7b9


Check the IS-IS routing table

<RTA>display isis route ISIS Level - 1 Forwarding Table : Type - D -Direct, C -Connected, I -ISIS, S -Static, O -OSPF B -BGP, R -RIP Flags: R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set Destination/Mask In.Met Ex.Met NextHop Interface Flags-------------------------------------------------------------------------------D 1.1.1.1/32 10 Direct LoopBack0 R/L/- D 10.1.1.0/30 10 Direct Serial2/0 R/L/- I 2.2.2.2/32 20 10.1.1.2 Serial2/0 R/L/- ISIS Level - 2 Forwarding Table :… Destination/Mask In.Met Ex.Met NextHop Interface Flags-------------------------------------------------------------------------------D 1.1.1.1/32 10 Direct LoopBack0 R/L/- D 10.1.1.0/30 10 Direct Serial2/0 R/L/- I 2.2.2.2/32 20 10.1.1.2 Serial2/0 -/-/-


Tuning The IS-IS Configuration

The following command can be configure IS-IS for optimized performance

1. is-level { level-1 | level-1-2 | level-2 }

2. cost-style {compatible | narrow | narrow-compatible | wide | wide-compatible }

3. silent-interface

4. isis circuit-level [ level-1 | level-1-2 | level-2 ]

5. isis cost value [ level-1 | level-2 ]


Multiple Area IS-IS Configuration

10.1.1.0/30

20.1.1.0/30

30.1.1.0/30





RTA

RTB RTC

RTD

.1

.2

.1 .2

.1

.2

RTB and RTC is lever 1&2 IS-IS router , RTA and RTD is lever 1 IS-IS router onlyRTA and RTB belonging to area 49.0001 , RTC and RTD belonging to area 49.0002


Multiple Area IS-IS Configuration sysname RTA#isis network-entity 49.0001.0000.0000.0001.00 is-level Level-1# interface Serial2/0 link-protocol ppp ip address 10.1.1.1 255.255.255.252 isis enable#interface LoopBack0 ip address 1.1.1.1 255.255.255.255 isis enable

sysname RTB#isis network-entity 49.0001.0000.0000.0002.00#interface Ethernet0/0 ip address 20.1.1.1 255.255.255.252 isis enable isis circuit-level level-2 isis dis-priority 65#interface Serial2/0 link-protocol ppp ip address 10.1.1.2 255.255.255.252 isis enable isis circuit-level level-1#interface LoopBack0 ip address 2.2.2.2 255.255.255.255 isis enable


Multiple Area IS-IS Configuration

sysname RTC#isis network-entity 49.0002.0000.0000.0003.00#interface Ethernet0/0 ip address 20.1.1.2 255.255.255.252 isis enable isis circuit-level level-2#interface Serial2/0 link-protocol ppp ip address 30.1.1.1 255.255.255.252 isis enable isis circuit-level level-1#interface LoopBack0 ip address 3.3.3.3 255.255.255.255 isis enable

sysname RTD#isis network-entity 49.0002.0000.0000.0004.00 is-level Level-1# interface Serial2/0 clock DTECLK1 link-protocol ppp ip address 30.1.1.2 255.255.255.252 isis enable#interface LoopBack0 ip address 4.4.4.4 255.255.255.255 isis enable


Show IS-IS neighbors


<RTB>display isis peer System ID Interface Circuit ID State HoldTime Type Pri0000.0000.0001 Serial2/0 002 Up 27s L1 0 0000.0000.0003 Ethernet0/0 0000.0000.0002.03 Up 28s L2 64

<RTC>display isis peer System ID Interface Circuit ID State HoldTime Type Pri0000.0000.0002 Ethernet0/0 0000.0000.0002.03 Up 7s L2 65 0000.0000.0004 Serial2/0 002 Up 22s L1 0

<RTD>display isis peer System ID Interface Circuit ID State HoldTime Type Pri0000.0000.0003 Serial2/0 001 Up 25s L1 0


Show the LSDB

<RTA>display isis lsdb IS-IS Level-1 Link State Database Lsp ID Sequence Holdtime A_P_O Checksum >0000.0000.0001.00-00 0x00000005 1025 0_0_0 0x3b26 0000.0000.0002.00-00 0x0000000c 1075 1_0_0 0x8cf4

<RTB>display isis lsdb IS-IS Level-1 Link State Database Lsp ID Sequence Holdtime A_P_O Checksum 0000.0000.0001.00-00 0x00000005 1152 0_0_0 0x3b26>0000.0000.0002.00-00 0x0000000b 303 1_0_0 0x8ef3

IS-IS Level-2 Link State Database Lsp ID Sequence Holdtime A_P_O Checksum >0000.0000.0002.00-00 0x0000000d 303 0_0_0 0x7d61>0000.0000.0002.03-00 0x00000004 303 0_0_0 0xc8ba 0000.0000.0003.00-00 0x0000000b 500 0_0_0 0x3270


Show IS-IS routing table <RTB>display isis route … Destination/Mask In.Met Ex.Met NextHop Interface Flags-------------------------------------------------------------------------------D 2.2.2.2/32 10 Direct LoopBack0 R/L/- D 10.1.1.0/30 10 Direct Serial2/0 R/L/- I 1.1.1.1/32 20 10.1.1.1 Serial2/0 R/L/- D 20.1.1.0/30 10 Direct Ethernet0/0 R/L/-

ISIS Level - 2 Forwarding Table :... Destination/Mask In.Met Ex.Met NextHop Interface Flags-------------------------------------------------------------------------------D 2.2.2.2/32 10 Direct LoopBack0 R/L/- D 10.1.1.0/30 10 Direct Serial2/0 R/L/- D 20.1.1.0/30 10 Direct Ethernet0/0 R/L/- I 30.1.1.0/30 20 20.1.1.2 Ethernet0/0 R/-/- I 4.4.4.4/32 30 20.1.1.2 Ethernet0/0 R/-/- I 3.3.3.3/32 20 20.1.1.2 Ethernet0/0 R/-/-







Routes Summary in the IS-IS

20.1.1.0/30



RTB RTC.1 .2

Destination/Mask Protocol Pre Cost100.0.0.0/24 IS-IS 15 20100.0.1.0/24 IS-IS 15 20100.0.2.0/24 IS-IS 15 20100.0.3.0/24 IS-IS 15 20

[RTB-isis]summary 100.0.0.0 255.255.252.0 level-2

Destination/Mask Protocol Pre Cost100.0.0.0/22 IS-IS 15 30

area 49.0001 area 49.0002


Route Import into IS-IS Routing Domain

[RTA]ip route-static 200.0.0.0 255.255.255.0 100.0.0.2[RTA]isis[RTA-isis]import-route static ip level-1 cost 15

<RTB>display ip routing-table Routing Table: public netDestination/Mask Protocol Pre Cost Nexthop Interface20.1.1.1/32 DIRECT 0 0 127.0.0.1 InLoopBack0100.0.0.0/24 IS-IS 15 20 10.1.1.1 Serial2/0 200.0.0.0/24 IS-IS 15 25 10.1.1.1 Serial2/0 ......<RTB>

10.1.1.0/30

Loopback 01.1.1.1./32


RTA RTB.1 .2


Route leak

20.1.1.0/30


Loopback 03.3.3.3/32RTB RTC

.1 .2

area 49.0001 area 49.0002

RTA Loopback 01.1.1.1/32

10.1.1.0/30.1 .2

<RTA>display isis route … Destination/Mask In.Met Ex.Met NextHop Interface Flags-------------------------------------------------------------------------------D 10.1.1.0/30 10 Direct Serial2/0 R/L/- I 20.1.1.0/30 20 10.1.1.2 Serial2/0 R/-/- I 0.0.0.0/0 10 10.1.1.2 Serial2/0 R/-/- D 1.1.1.1/32 10 Direct LoopBack0 R/L/- I 2.2.2.2/32 20 10.1.1.2 Serial2/0 R/-/- I 3.3.3.3/32 30 10.1.1.2 Serial2/0 R/-/U

[RTB-isis]import-route isis level-2 into level-1







Common command to show IS-IS information (1)

List IS-IS interface

List IS-IS Neighbors

<RTA>display isis interface Interface IP Address Id Link.Sta IP.Sta MTU Type DIS Serial2/0 10.1.1.1 001 Up Up 1500 L12 -- LoopBack0 1.1.1.1 002 Up Up 1533 L12 No/No



Common command to show IS-IS information (2)

List IS-IS LSDB

List IS-IS Routes

<RTA>display isis lsdb IS-IS Level-1 Link State Database Lsp ID Sequence Holdtime A_P_O Checksum >0000.0000.0001.00-00 0x00000007 995 0_0_0 0x5b04 0000.0000.0002.00-00 0x00000011 1039 1_0_0 0xf558

<RTA>display isis route ISIS Level - 1 Forwarding Table : Type - D -Direct, C -Connected, I -ISIS, S -Static, O -OSPF B -BGP, R -RIP Flags: R-Added to RM, L-Advertised in LSPs, U-Up/Down Bit Set Destination/Mask In.Met Ex.Met NextHop Interface Flags-------------------------------------------------------------------------------I 20.1.1.0/30 20 10.1.1.2 Serial2/0 R/-/- I 2.2.2.2/32 20 10.1.1.2 Serial2/0 R/-/- …


Troubleshooting IS-IS problem

1. IS-IS process enable ?

2. IS-IS NET configuration correctly ?

3. IS-IS interface enabled ?

4. IS-IS neighbors established ?

5. LSP flooded ?

6. LSDB consistence ?

7. IS-IS route calculation correctly ?


Summary

Basic configuration for the IS-IS

IS-Is advanced configuration

Commands used to show related IS-IS

information

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Oda030007,5 is-Is Configuration Issue1.4