From: David Ham (ccieau@xxxxxxxxxxx)
Date: Thu May 16 2002 - 22:10:47 GMT-3
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 > > >********************************************************************** >PowerTel Limited, winners of >Broadband Wholesale Carrier of the year, CommsWorld Telecomms Awards 2001 >Best Emerging Telco, Australian Telecom Awards 2001 > >********************************************************************** >This email (including all attachments) is intended solely for the named >addressee. It is confidential and may contain commercially sensitive >information. If you receive it in error, please let us know by reply email, >delete it from your system and destroy any copies. > >This email is also subject to copyright. No part of it should be >reproduced, >adapted or transmitted without the prior written consent of the copyright >owner. > >Emails may be interfered with, may contain computer viruses or other >defects >and may not be successfully replicated on other systems. We give no >warranties in relation to these matters. If you have any doubts about >the authenticity of an email purportedly sent by us, please contact us >immediately. > >**********************************************************************
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