From: David Luu (wicked01@xxxxxxxxxxxxx)
Date: Thu May 16 2002 - 22:36:11 GMT-3
it works correctly...if you want all the routes from ospf to have an origin
code of "i" then use network statements for the other routes in bgp
At 11:10 AM 5/17/2002 +1000, David Ham wrote:
>Hi Jason,
>
>I have tried on my lab but I have trouble getting orgin code in.
>I thought I should see origin code "i" at the bgp routes that learnt from
>ospf but I don't. Am I missing something?
>
>Here is my config.
>
>R2 -- R3 --- R1
>----------------------------------------------------------------------
>R2
>--snip----
>interface Loopback0
>ip address 2.2.2.2 255.255.255.255
>
>router ospf 1
>log-adjacency-changes
>redistribute bgp 10 subnets
>network 172.16.7.0 0.0.0.255 area 0
>!
>router bgp 10
>no synchronization
>table-map set-tag
>bgp log-neighbor-changes
>network 2.2.2.2 mask 255.255.255.255
>redistribute ospf 1 match internal external 1 external 2 route-map tags
>no auto-summary
>
>route-map tags permit 10
>set as-path tag
>
>route-map set-tag permit 10
>match as-path 1
>set automatic-tag
>
>ip as-path access-list 1 permit .*
>
>
>----
>
>R2#sh ip bgp
>BGP table version is 5, local router ID is 2.2.2.2
>Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
>Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
>*> 1.1.1.1/32 172.16.7.3 1 32768 ?
>*> 2.2.2.2/32 0.0.0.0 0 32768 i
>*> 172.16.1.0/24 172.16.7.3 70 32768 ?
>*> 172.16.7.0/24 0.0.0.0 0 32768 ?
>
>
>--------------------------------------------------------------------
>R1
>---snip--
>
>interface Loopback1
>ip address 1.1.1.1 255.255.255.255
>
>router ospf 1
>log-adjacency-changes
>redistribute bgp 10 subnets
>network 172.16.1.0 0.0.0.255 area 0
>!
>router bgp 10
>no synchronization
>table-map set-tag
>bgp log-neighbor-changes
>network 1.1.1.1 mask 255.255.255.255
>redistribute ospf 1 match internal external 1 external 2 route-map tags
>no auto-summary
>
>route-map tags permit 10
>set as-path tag
>!
>route-map set-tag permit 10
>set automatic-tag
>
>
>--------
>R1#sh ip bgp
>BGP table version is 7, local router ID is 172.16.240.1
>Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
>Origin codes: i - IGP, e - EGP, ? - incomplete
>
> Network Next Hop Metric LocPrf Weight Path
>*> 1.1.1.1/32 0.0.0.0 0 32768 i
>*> 2.2.2.2/32 172.16.1.3 1 32768 ?
>*> 172.16.1.0/24 0.0.0.0 0 32768 ?
>*> 172.16.7.0/24 172.16.1.3 70 32768 ?
>----------------------------------------------------------------------
>Thanks in advance.
>Regards,
>
>David Ham
>OPTUS
>
>>From: Jason Sinclair <sinclairj@powertel.com.au>
>>Reply-To: Jason Sinclair <sinclairj@powertel.com.au>
>>To: "'Carlos G Mendioroz'" <tron@huapi.ba.ar>, Jason Sinclair
>><sinclairj@powertel.com.au>
>>CC: Groupstudy ccielab list <ccielab@groupstudy.com>
>>Subject: RE: POP Quiz - Answers
>>Date: Thu, 16 May 2002 09:41:45 +1000
>>
>>All,
>>
>>Please note that I left out the most important part. You also need the
>>following:
>>
>>Router bgp 100
>>Table-map autotag
>>
>>Route-map autotag permit 10
>>Set automatic-tag
>>
>>The difference is that the as-path tag will preserve any as-path info in the
>>redistribution and the automatic tag will preserve the origin attribute.
>>
>>As I stated earlier time was an issue this last week, in future quizzes I
>>will ensure that I lab them for you. Also, these quizzes are more intended
>>to make you think about things and how they actually work, rather than
>>always having the correct answer. Please let me know if these are of a
>>benefit to you.
>>
>>Regards,
>>
>>Jason Sinclair CCIE #9100
>>Manager, Network Control Centre
>>POWERTEL
>>Ground Level, 55 Clarence Street,
>>SYDNEY NSW 2000
>>AUSTRALIA
>>office: + 61 2 8264 3820
>>mobile: + 61 416 105 858
>>* sinclairj@powertel.com.au
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: Carlos G Mendioroz [mailto:tron@huapi.ba.ar]
>> Sent: Thursday, 16 May 2002 01:03
>> To: Jason Sinclair
>> Cc: Groupstudy ccielab list
>> Subject: Re: POP Quiz - Answers
>>
>> Jason,
>> one of the requirements you had was:
>>
>> 5. The origin code for your route must be the same
>>as
>> the original origin code when the route was injected into
>>BGP
>>
>> and it seems its not working with your solution, at least
>>for me:
>>
>> At rtrC:
>> BGP table version is 5, local router ID is 2.2.2.2
>> Status codes: s suppressed, d damped, h history, * valid, >
>>best, i -
>> internal
>> Origin codes: i - IGP, e - EGP, ? - incomplete
>>
>> Network Next Hop Metric LocPrf Weight
>>Path
>> *> 1.1.1.1/32 172.16.1.1 1 32768 ?
>> *> 2.2.2.2/32 0.0.0.0 0 32768 i
>> *> 172.16.0.0 0.0.0.0 0 32768 ?
>> *> 192.168.1.0 172.16.1.1 128 32768 ?
>>
>> The origin code for 2.2.2.2 is "i" for a locally generated
>>route
>> (internal)
>> and the one for the remote loopback is "?" for incomplete.
>>
>> It seems to me that redistributing the igp (ospf) and
>>connected into
>> bgp would do the trick (both would be incomplete then)
>>although
>> it would not be that interesting...
>>
>>
>> Jason Sinclair wrote:
>> >
>> > All,
>> > Guys,
>> >
>> > For pop quiz 1 I have the following configs. I have not
>>labbed them due
>> > to time constraints, however I believe they are correct.
>>If you see any
>> > mistakes please advise.
>> >
>> > Configs are:
>> >
>> > RtrA
>> > Int lo0
>> > Ip address 1.1.1.1 255.255.255.255
>> >
>> > Int s0
>> > Ip address 192.168.1.1 255.255.255.0
>> >
>> > Router ospf 100
>> > Network 192.168.1.0 0.0.0.255 area0
>> > Redistribute bgp 100 subnets
>> >
>> > Router bgp 100
>> > Network 1.1.1.1 mask 255.255.255.255
>> > Redistribute ospf 100 route-map tags
>> > No auto-summary
>> > No synchronization
>> >
>> > Route-map tags permit 10
>> > Set as-path tag
>> >
>> > Rtrb
>> > Int s0
>> > Ip address 192.168.1.2 255.255.255.0
>> > Clock rate 64000
>> >
>> > Int s1
>> > Ip address 172.16.1.1 255.255.255.0
>> > Clock rate 64000
>> >
>> > Router ospf 100
>> > Network 192.168.1.0 0.0.0.255 area 0
>> > Network 172.16.1.0 0.0.0.255 area 0
>> >
>> > Rtrc
>> > Int lo0
>> > Ip address 3.3.3.3 255.255.255.255
>> >
>> > Int s0
>> > Ip address 172.16.1.2 255.255.255.0
>> >
>> > Router ospf 100
>> > Network 172.16.1.0 0.0.0.255 area0
>> > Redistribute bgp 100 subnets
>> >
>> > Router bgp 100
>> > Redistribute ospf 100 route-map tags
>> > Network 3.3.3.3 mask 255.255.255.255
>> > No auto-summary
>> > No synchronization
>> >
>> > Route-map tags permit 10
>> > Set as-path tag
>> >
>> > Cheers,
>> >
>> > Jason Sinclair CCIE #9100
>> > Manager, Network Control Centre
>> > POWERTEL
>> > Ground Level, 55 Clarence Street,
>> > SYDNEY NSW 2000
>> > AUSTRALIA
>> > office: + 61 2 8264 3820
>> > mobile: + 61 416 105 858
>> > * sinclairj@powertel.com.au
>> >
>> > -----Original Message-----
>> > From: Jason Sinclair
>> > [mailto:sinclairj@powertel.com.au]
>> > Sent: Wednesday, 8 May 2002 13:32
>> > To: 'ccielab@groupstudy.com'
>> > Subject: POP Quiz
>> >
>> > All,
>> >
>> > I am proposing to regularly post little
>>scenarios to
>> > this forum. If you see
>> > any benefit in this, the first is below:
>> >
>> > Quick Scenario 1:
>> >
>> > A quick scenario - should take 10 minutes
>>to achieve.
>> > Topology is:
>> >
>> > RtrA-----rtrB-------rtrC
>> >
>> > Rules:
>> > 1. You can run BGP on rtrA and rtrC,
>>but NOT rtrB.
>> > 2. Any IGP can be run on rtrA, rtrB,
>>rtrC.
>> > 3. Create a loopback on rtrA and rtrC
>>and ensure
>> > that
>> > the opposite
>> > route to the loopback is visible to the
>>remote router
>> > via BGP.
>> > 4. You cannot peer rtrA and rtrC with
>>respect to
>> > BGP
>> > 5. The origin code for your route
>>must be the same
>> > as
>> > the original
>> > origin code when the route was injected
>>into BGP
>> > 6. 10 minutes to complete
>> >
>> > I will post answers in 5 days time.
>> >
>> > Cheers,
>> >
>> > Jason Sinclair CCIE #9100
>> > Manager, Network Control Centre
>> > POWERTEL
>> > Ground Level, 55 Clarence Street,
>> > SYDNEY NSW 2000
>> > AUSTRALIA
>> > office: + 61 2 8264 3820
>> > mobile: + 61 416 105 858
>> > * sinclairj@powertel.com.au
>> >
>> >
>> >
>>
>>
>> --
>> Carlos G Mendioroz <tron@huapi.ba.ar> LW7 EQI Argentina
>>
>>
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