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ISIS L1-L2 database

Tom Drummer
Level 1
Level 1

Hi Experts,

Basic question regarding the ISIS process. If I have a default config of ISIS between simple two IOS-XR routers:
In this case both level-1-2 will form neighbor relationship.

RP/0/RP0/CPU0:test1#sh run router isis
router isis ISIS-CORE
net 49.0001.1921.6814.4131.00
nsr
nsf cisco
log adjacency changes
address-family ipv4 unicast
!
interface Bundle-Ether1001
address-family ipv4 unicast
!
!
interface Bundle-Ether1010
address-family ipv4 unicast
!
!
interface Bundle-Ether4101
address-family ipv4 unicast
!
!
interface Loopback0
passive
address-family ipv4 unicast
!
!
!

RP/0/RP0/CPU0:test2#sh run router isis
Tue Apr 23 18:18:17.006 UTC
router isis ISIS-CORE
net 49.0001.1921.6814.4132.00
nsr
nsf cisco
log adjacency changes
address-family ipv4 unicast
!
interface Bundle-Ether1001
address-family ipv4 unicast
!
!
interface Bundle-Ether4201
address-family ipv4 unicast
!
!
interface Loopback0
passive
address-family ipv4 unicast
!
!
!

Level-1 database will show the prefixes from testp2: 10.10.10.2/32, 172.16.1.0/31, 172.16.1.8/31

RP/0/RP0/CPU0:testp1#sh isis database level 1 verbose
Tue Apr 23 20:35:24.542 CEST

IS-IS ISIS-CORE (Level-1) Link State Database
LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL
testp1.00-00 * 0x00000009 0x4be8 671 /* 0/0/0
Area Address: 49.0001
Metric: 10 IS testp2.01
Metric: 0 IP 10.10.10.1/32
Metric: 10 IP 172.16.1.0/31
Metric: 10 IP 172.16.1.2/31
NLPID: 0xcc
IP Address: 10.10.10.1
Hostname: testp1
testp2.00-00 0x00000006 0x2a03 706 /1200 0/0/0
Area Address: 49.0001
Metric: 0 IP 10.10.10.2/32
Metric: 10 IP 172.16.1.0/31
Metric: 10 IP 172.16.1.8/31
NLPID: 0xcc
IP Address: 10.10.10.2
Hostname: testp2
Metric: 10 IS testp2.01
dplxtestp2.01-00 0x00000003 0xf866 741 /1200 0/0/0
Metric: 0 IS testp2.00
Metric: 0 IS testp1.00

Total Level-1 LSP count: 3 Local Level-1 LSP count: 1

 

Database Level-2 why will show in case of testp2 the whole database?:

RP/0/RP0/CPU0:testp1#sh isis database level 2 verbose
Tue Apr 23 20:38:23.195 CEST

IS-IS ISIS-CORE (Level-2) Link State Database
LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL
testp1.00-00 * 0x0000003c 0x7969 626 /* 0/0/0
Metric: 0 IP 10.10.10.1/32
Metric: 10 IP 172.16.1.0/31
Metric: 10 IP 172.16.1.2/31
Metric: 10 IP 10.10.10.2/32
Metric: 20 IP 172.16.1.8/31
NLPID: 0xcc
IP Address: 10.10.10.1
Hostname: testp1
Area Address: 49.0001
Metric: 10 IS testp2.01
dplxtestp2.00-00 0x00000038 0x776c 669 /1200 0/0/0
Hostname: testp2
NLPID: 0xcc
Metric: 10 IP 10.10.10.1/32
Metric: 0 IP 10.10.10.2/32
Metric: 10 IP 172.16.1.0/31
Metric: 20 IP 172.16.1.2/31
Metric: 10 IP 172.16.1.8/31
IP Address: 10.10.10.2
Area Address: 49.0001
Metric: 10 IS testp2.01
dplxtestp2.01-00 0x0000001d 0xc480 653 /1200 0/0/0
Metric: 0 IS testp2.00
Metric: 0 IS testp1.00

Total Level-2 LSP count: 3 Local Level-2 LSP count: 1

Thank you for the help

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