Routing Bit not in the output of IOS image in CML2

[ksudi@somatelco.com]

Hello,

In CML2, IOS images do not display

Routing Bit

The output of the command includes

Routing Bit

in

R1#sho ip os database external 150.1.9.9

OSPF Router with ID (150.1.1.1) (Process ID 1)

Type-5 AS External Link States

Routing Bit Set on this LSA in topology Base with MTID 0
LS age: 1786
Options: (No TOS-capability, DC, Upward)
LS Type: AS External Link
Link State ID: 150.1.9.9 (External Network Number )
Advertising Router: 150.1.6.6
LS Seq Number: 80000008
Checksum: 0xC883
Length: 36
Network Mask: /32
Metric Type: 2 (Larger than any link state path)
MTID: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0

Compared with another version:

R6#show ip ospf database external

OSPF Router with ID (150.1.6.6) (Process ID 1)

Type-5 AS External Link States

LS age: 1533
Options: (No TOS-capability, DC, Upward)
LS Type: AS External Link
Link State ID: 150.1.9.9 (External Network Number )
Advertising Router: 150.1.6.6
LS Seq Number: 80000008
Checksum: 0xC883
Length: 36
Network Mask: /32
Metric Type: 2 (Larger than any link state path)
MTID: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0

LS age: 1533
Options: (No TOS-capability, DC, Upward)
LS Type: AS External Link
Link State ID: 155.1.9.0 (External Network Number )
Advertising Router: 150.1.6.6
LS Seq Number: 80000008
Checksum: 0xE16E
Length: 36
Network Mask: /24
Metric Type: 2 (Larger than any link state path)
MTID: 0
Metric: 20
Forward Address: 0.0.0.0
External Route Tag: 0

Both destinations are reachable and my only issue is that only one version outputs the

Routing Bit

information.

This problem exists in all versions of IOS code in CML2. I am wondering if anyone is seeing the

Routing Bit

in their CML2 routers and if so, which version of IOS is in use. Any assistance in this matter is greatly appreciated.

[Giuseppe Larosa]

Hello ksudi@somatelco.com ,

you would like to see the P bit ?   in NSSA area conversion of external type 7 to type 5 requires :

that the NSSA ABR sends the NSSA  O IA type 7 with the P bit set ,

but you are looking at LSA type 5

>> Routing Bit Set on this LSA in topology Base with MTID 0

this is version dependent and means that you are looking at an IOS XE router that implements multitopology , topology Base MTID 0 means the standard IPv4 unicast address family.

Look at RFC

EDit:

https://datatracker.ietf.org/doc/rfc4915/

https://www.rfc-editor.org/rfc/rfc4915.html

yes it is the support of multipology in OSPF   v2

Type		RFC - Proposed Standard (June 2007; No errata) Was draft-ietf-ospf-mt (ospf WG)
	Authors		Sina Mirtorabi  , Liem Nguyen  , Abhay Roy  , Peter Psenak  , Padma Pillay-Esnault
	Last updated		2018-12-20

see

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/xe-17/iro-xe-17-book/ip6-route-ospfv3-add-fam-xe.html

This has nothing to do with Cisco Modeling LAbs CML2 as far I know. as @Georg Pauwen has also noted.

Feel free to  provide more info

Hope to help

Giuseppe

[ksudi@somatelco.com]

Hello Giuseppe,

I am not troubleshooting OSPF at all. I am looking for a vIOS code version that will give me 

Routing Bit

Set similar to the output below:

R7#sho ip ospf database router

OSPF Router with ID (150.1.7.7) (Process ID 1)

Router Link States (Area 2)

Routing Bit Set on this LSA in topology Base with MTID 0
LS age: 1196
Options: (No TOS-capability, DC)
LS Type: Router Links
Link State ID: 150.1.6.6
Advertising Router: 150.1.6.6
LS Seq Number: 80000011
Checksum: 0xE20A
Length: 36
Area Border Router
AS Boundary Router
Unconditional NSSA translator
Number of Links: 1

I have multiple images that are in CML2 and none of them gives the output that includes

Routing Bits

Thanks and hopefully, I clarified my issue.

[Georg Pauwen · Accepted solution]

Hello,

CML2 uses the IOSv versions. I noticed the

Routing Bit Set

also not being there in some XE versions. Interesting observation, not sure why that would have been dropped.