Inter-AS option B statistics

Hello,
we would like to measure the traffic per vrf in case of Inter-AS option B on the interconnecting links between the providers.
How can we do it? AFAIK bgp-policy accounting supports only standard community-list, if it could support extcommunity-list, then we would have a solution.
BR, Attila

Fly,
I am not sure what you mean by VRF interface. You don't really need a VRF interface. You only need to create a VRF context with the same RT import export as the VPN in question. The aggregation would be done at the "address-family ipv4 vrf xxx" level, not at the vpnv4 level. The aggregate will cause an aggregate label to be installed in the LFIB and advertised to the remote PEs via BGP vpnv4. The more specific routes will be installed in the FIB for the specific VRF context. When packets arrive at the ASBR with the aggregate label, the label will be removed and a second lookup will be performed against the FIB for the VRF context.
Regards

Similar Messages

(9I) EXPORT의 TABLESPACE OPTION, IMPORT의 STATISTICS OPTION

제품 : ORACLE SERVER
작성날짜 : 2004-08-13
(9I) EXPORT의 TABLESPACE OPTION, IMPORT의 STATISTICS OPTION
===========================================================
PURPOSE
Oracle 9i에서의 새로운 IMPORT parameter 인 STATISTICS 와
EXPORT 의 새로운 기능인 TABLESPACE parameter에 관한 설명이다.
SCOPE
Export Transportable Tablespace Feature는 8i~10g Standard Edition에서는
지원하지 않는다.
Explanation & Example
1. Oracle 9i에서는 STATISTICS 라는 새로운 Import parameter 값을 제공한다.
비교 ) Oracle 8i에서는 ANALYZE parameter와 RECALCULATE_STATISTICS
parameter의 조합으로 사용한다.
- ALWAYS : 미리 계산된 통계정보가 불안정하든 하지 않든 간에
상관없이 통계정보를 항상 import. (Default)
- NONE : 미리 계산된 통계정보를 import하지 않는다.
- SAFE : 불안정하면 table을 import한후 통계정보를 재계산하고
그렇지 않으면 미리 계산된 통계정보를 import.
- RECALCULATE : 미리 계산된 통계정보를 import하는 대신에 import한 후
table에 대한 통계정보를 재계산.
여기서 잠깐 통계정보가 불안정하다는 것은 언제를 말하는지를 짚어본다.
: Export time에 아래와 같은 경우에 미리 계산된 통계정보를 불안정하다
고 표시한다.
- Export하는 동안에 row error가 있을 때
- Client character set 또는 NCHAR character set이 server의
character set 또는 NCHAR character set과 다를 때
- Query option을 사용할 때 ( 8i 이상에서 제공하는 새로운
parameter)
- 특정 partition 또는 subpartition만이 export될 때
비교 ) Export 시에 STATISTICS parameter는 estimate, compute, none
의 세가지 값을 가지며 estimate가 default이다.
2. Oracle 9i 에서는 특정 tablespace에 있는 table을 export하기 위한
TABLESPACE라는 새로운 parameter를 제공한다.
- index가 어느 tablesapce에 속해 있는지의 여부에 상관없이 tablespace
에 속한 table와 연관된 index는 모두 export된다.
- TABLESPACE mode로 export을 받기 위해서는 EXP_FULL_DATABASE
privilege를 가지고 있어야 한다.
비교 ) 8i에서의 TABLESPACE option은 8i에서의 새로운 기능인
TRANSPORTABLE TABLESPACE 기능을 사용하는 데 필요한 단지 meta
data만을 export받는 것에 그친다. TABLESPACE 단위로 data을 받을
수는 없다.
9i에서도 믈론 TABLESPACE option은 TRANSPORTABLE TABLESPACE 기
능을 위해서도 사용이 된다.
RELATED DOCUMENTS
<Note:159787.1>
Oracle 9i New Features for Administrtors.

Hi
1)if I use the 3rd option it should gather stats for
all the objects including indexes. However, when I
used that option it didn't gather satas for Index. Do
I need to use cascade=>TRUE option?
Yes, default is FALSE, so need to force TRUE
2) I need to backup my current stats and gather new
stats for entire DB. If I export DATABASE stats will
it export all stats including index, system?
Yes
3) If I collect stats using GATHER_DATABASE_STATS, Do
I need to explicitly collect other stats for index,
system etc?
No

Inter-as option B summary vpnv4 route at ASBR boundary

inter-as option B, can i summary vpnv4 route at asbr boundary.
i create VRF at boundary asbr, and summary vpnv4 route from upstream PE, but i can't ping destination vrf pc.
i trace,the traffic end at ASBR VRF interface. and ASBR vrf can't forward traffic back to destion PE.
is there any solution i can summary vpn route at boundary ASBR.
thank you!
fly

Fly,
I am not sure what you mean by VRF interface. You don't really need a VRF interface. You only need to create a VRF context with the same RT import export as the VPN in question. The aggregation would be done at the "address-family ipv4 vrf xxx" level, not at the vpnv4 level. The aggregate will cause an aggregate label to be installed in the LFIB and advertised to the remote PEs via BGP vpnv4. The more specific routes will be installed in the FIB for the specific VRF context. When packets arrive at the ASBR with the aggregate label, the label will be removed and a second lookup will be performed against the FIB for the VRF context.
Regards

VPLS BGP signaling configuration for L2VPN Inter-AS Option A

Hi All,
does someone confirm with me for VPLS BGP Signaling feature is available on Cisco ASR 9K XR version right now ? or coming soon ?
if not, did someone have a fully configuration example ( from end to end, and including MPLS setup ) under IOS version for L2VPN Inter-AS Option A?
it would be much appreciated if you could share with me !
Eric

hello belalcciejo,
has your problem been resolved already ? since I am starting work on same setup right now. could you mind share your Cisco end configuration to me without your confidential information?
thanks, please let me know if possible.
Eric

InterAS MPLS Option C (BGP IPv4 + Labels) IOS XR with eBGP multihop session

Hello,
Right now we have InterAS MPLS Option C configured between 2 autonomous systems.
Now we need to add more bandwith and would like to add another interface between the two routers establishing a multihop session using loopbacks to load share traffic.
I know that IOS-XR does not automatically learn directly connected host routes so for the XR router to assign labels you'll need to configure a static host route to ensure MPLS forwarding to the neighboring AS.
This works with directly connected neighbors but when I try to enable the multihop session, the XR does not assign labels even configuring the staic host route.
Does anybody has a configuration like that working?
Thanks!!
Jose.

Hello Jose
There are basically two options in Option C L3VPN setup. I will discuss the first option for Multihop.
Following are the key points that distinguish the InterAS Option C from previous options.
1) External Multihop BGP address families are invoked between two different autonomous systems; however, these eBGP sessions are invoked between the route reflectors in each AS and not on the ASBR. The route reflector in each AS thus passes labeled ipv4 unicast VPN routes to the other AS. Note:- The route reflector in this case will have PE clients in the vpnv4 address family within that Autonomous System.
2) ASBRs facilitate the creation of InterAS LSP by providing labeled /32s for PE and Route Reflector loopback.
3) This option enhances scalability because ASBRs do not handle VPNv4 routes in fact this option gets rid of the extra L3VPN LFIB that is created as a result of option B . The LFIB size is minimal as we control the redistribution to the only 2 needed loopback addresses (remote ASBR and remote RR)
Sample config of the RR:
router bgp 102
address-family ipv4 unicast
address-family vpnv4 unicast
neighbor-group ibgp
remote-as 102
update-source Loopback0
address-family ipv4 unicast
   route-reflector-client
address-family vpnv4 unicast
   route-reflector-client
neighbor 192.168.253.3
remote-as 101
ebgp-multihop 255
description eBGP-RR-PEER-AS101
update-source Loopback0
address-family vpnv4 unicast
   route-policy allow-all in
   route-policy allow-all out
   next-hop-unchanged
neighbor 192.168.254.1
use neighbor-group ibgp
neighbor 192.168.254.3
use neighbor-group ibgp
neighbor 192.168.254.4
use neighbor-group ibgp
On the PE router, the config will look something like this:
router bgp 102
address-family ipv4 unicast
redistribute ospf 1 metric 3333 route-policy interAS-optionc-out
allocate-label route-policy interAS-optionc-out
neighbor 65.10.20.1
remote-as 101
address-family ipv4 labeled-unicast
   route-policy interAS-optionc-in in
   route-policy interAS-optionc-out out
neighbor 192.168.254.2
remote-as 102
update-source Loopback0
address-family ipv4 unicast
router static
address-family ipv4 unicast
65.10.20.1/32 TenGigE0/0/0/1
192.0.2.0/24 Null0 tag 10
route-policy interAS-optionc-in
if destination in remote-RR-PE then
    pass
else
    drop
endif
end-policy
route-policy interAS-optionc-out
if destination in local-RR-PE then
    pass
else
    drop
endif
end-policy
prefix-set local-RR-PE
192.168.254.2/32,
192.168.253.6/32,
192.168.253.5/32
end-set
prefix-set remote-RR-PE
192.168.253.2/32,
192.168.253.3/32,
192.168.253.3/32
end-set
Just for your clarification, 192.168.253.0/24 is the Remote AS networks and 192.168.254.0/24 is the local AS networks.
Hope this clarifies your doubts.
Cheers ... !!!
Vinit

L3VPN Inter-AS Option B with Inter-AS TE

Is it possible to route L3VPN traffic through a Inter-AS TE tunnel when Option B is the configuration? If you can please post sample configs with explanations.

can you try to usedestination IP in the hean end that point to the tail-end IP
and use static route that for this IP point to the TE tunnel
e.g.
tunnelx
tunnel destination 2.2.2.2
ip route 2.2.2.2 255.255.255.255 tunnel x
then you may staticaly route traffic to TE tunnel for Layer 3 VPN traffic or autoroute once the next hope is chnaged to 2.2.2.2
To change the next hope of L3VPN MP-iBGP using route-map by making it using the tailend IP (2.2.2.2 ) under the relevant bgp address-family/VPNv4 at the ASBR/RR toward the desired PE ( head end )
e.g
ASBR/RR
bgp xx
address-family vpnv4neighbor [head-end/PE IP] route-map map1 out
route-map map1 permit
set ip next-hope 2.2.2.2
in the path option you should have both your AS ASBR and the remote AS ASBR IPs
in the ASBR of both ends in te phsycial interface facing the other AS:
int x/x
mpls traffic-eng passive-interface nbr-te-id [next-hop ASBR IP ] nbr-igp-id ospf [next-hop ASBR IP]
and let us know if this help !
Message was edited by: Marwan

Inter-AS Options

I'm looking into extending the mpls network by NNI with other SPs. For scalability reason, most dosc recommended to use Option B (MP-eBGP for VPNv4) for the Inter-AS connectivity.
However, it seems that most SPs that i talked to prefer Option A (back-to-back vrf). Reasons being:
- setup is easier, does not require standardization of RT
- provisioning & fault isolation is easier, as each customer is under a separate vrf at the ASBR. Also, when there is configuration mistake, it will be less likely to affect other customers that is on the same NNI.
- traffic control (eg. shaping) per customer is possible across the NNI
Not sure if Option A is the norm in the industry. Hope to hear some input from your guys. Thanks :)

thats the one thing that stops me from advising implementing option C. The security headache + politics of two different companies security teams actually agreeing just doesnt make it worth the extra hassle. I agree with Harry that option C is by far the best scalable solution but because of the issues I have already said I ONLY use option B. The thing that I also do differently is I do not turn off route-target filtering and instead create a vrf with only having a RT import on it. This way the PE-ASBR only has to hold the vpnv4 routing tables that it is really interested in. The other neat "in the middle" solution is to connect between ASBRs with two gig connections and peer between loopbacks. This way you can load balance the traffic over the two gig links. The command to do this is mpls bgp forwarding on the actual interfaces and you also need to create a static route pointing the other providers loopback address. You then redistribute this static into your IGP. Yes, I hear Harry shouting whats the difference from doing that to option C. For some really odd reason the security chappies are happier with this single IP address and find it easier on their brains to secure. Dont ask me why - I just go for the solution of simple life.

When i inter to options and set the font in the content tab to larger number like 20 or another number and click ok it not respond and the font stell as it is what i can do for solving that problem ?

when opening the firefox page and go to search the font is small and when try to make it large throught the content tab it not respond

Hi Gaurav
I already locked for a OSS note, but i could not find the answer
Please, Could you tell me how you solve the problem?
Thanks
Ariel

Option A, 2 PE pair per Provider, Redundancy

Hi All,
Requesting suggestions for the following scenario, let's say we have 2 service providers (SP) offering MPLS VPNs through Option A (Back to Back VRF).
These SPs are connecting through two PE/ASBRs each, like SP As, PE_A1 and PE_A2 and SP Bs, PE_B1 and PE_B2.
PE_A1 is connected to PE_B1 and PE_A2 is connected to PE_B2, this configuration is to offer PE redundancy.
I am thinking of having HSRP between these different PEs. But reckon there has to be a better way to do this.
Any suggestions?
Thanks
Cheers
~sultan

Hi Sultan,
You seem to like challenges and thrilling changes ;-)
Well,
I guess what might also be interesting to you: "MPLS VPN - Inter-AS Option AB"
http://www.cisco.com/en/US/docs/ios/mpls/configuration/guide/mp_vpn_ias_optab.html
With this option you have VRF back-to-back, but only 1 MP-BGP session between ASBRs.
Gernerally potential issues are similar to a normal PE-CE situation
- protection from too many routes
- scalability in general
- PE security
- There was something I saw about BGP router-ID being the same for different VRFs and issues arising from this, but can neither remember the details nor find the reference.
Hope this helps!
Regards,
Martin

Using SET STATISTICS IO ON

I have a quick question regarding the use of the SET option SET STATISTICS IO ON. When I use this to monitor the number of reads done by different queries I'll often see large numbers of reads on tables with names like '#7B053305.' I understand
Worktable tables shown in the output are for tables SQL creates on the fly to address sorts, group bys, order bys, etc. What are these tables used for and how would I diminish large number of reads done on them?
Thanks.

SQL Server internally creates Worktable to Perform operations.refer the below link for more clearity
http://msdn.microsoft.com/en-us/library/aa175247(v=sql.80).aspx
http://sqlblog.com/blogs/paul_white/archive/2013/03/08/execution-plan-analysis-the-mystery-work-table.aspx
Satheesh
My Blog

EXPDP and statistics

Hi,
in 10g R2, it seems there is no option for statistics. Is there any ? How is the syntaxe ?
Thank you.

You can use EXCLUDE parameter.
Also have in mind that statistics are by default always saved for indexes and tables during the data pump export.
So , to not export them, use EXCLUDE=statistics.

Transportable Tablespace and Table Statistics

We are loading a large datawarehouse of about 2Tb, with tables up to 100Gb full of raster images. The database is 9.2.0.7 on Solaris, and we are using Transportable Tablespaces to move datafiles and tablespaces from data integration server to production server.
During the data integration, we calculate statistics on large tables, and it takes forever. We are wondering if these statistics are moved along with the metadata from data integration server to production server. In other words, should we calculate statistics before the tablespace export or after the tablespaces have been set online on the production server.
Thanks,

Hi,
Upto my knowledge you dont need to calculate statistics.
Even with export & import command there is a option for statistics.
So when ever you export oracle by default export the statistics of that table.
Hope this helps.
Regards
MMU

TE and Inter AS material ???

Hi,
I am confuse in TE and Inter AS topics,please any one explain me these and give me easy material if have ????
I found something for Inter AS option A,B,C but was tuff and confusing couldnt clearly understand all
specially where to use "send-lable","next-hop unchanged"!!!!
Bye,

Hi,
"send-label" and "next-hop-unchanged" are not related to TE. They are related to InterAS.
By default, when BGP advertise a VPNv4 prefix with nexthop as self, it will assign a local label and advertise to neighbors. But with any otehr address-family, it needs to be explicitly mentioned. SO when a label needs to be advertised via BGP (for IPv6 Unicast or IPv4 unicast), we need to use "send-label" to instruct BGP to assign a local label.
"next-hop-unchaned" is used in Option C. Inter-As Option C is something used in operators where both AS opeators agrees to exchange their internal address details (can be limited to just the edge PE node loopback address). This is commonly seen in merge scenarios.
In such scenarios, we establish a VPNv4 session between RRs on each AS and mark it as next-hop-unexchanged. For example, assume the below simple scenario,
(PE1-AS1)-----(RR-AS1)-----(Edge-AS1)--------(Edge-AS2)------(RR-AS2)------(PE1-AS2)
Assume x-AS1 are in AS1 and x-AS2 are in AS2.
When Option C is used, PE1-AS1 address will be advertised to RR-AS1 adn Edge-AS1 via IGP used in AS1 (say IGP1) and PE1-AS2 address will be advertised to RR-AS2 and Edge-AS2 via IGP used in AS2 (say IGP2).
Now edge PE node details needs to be exchanged between AS. To be more specific, PE1-AS1 should be advertised to AS2 and PE1-AS2 to be advertised by AS1. This is simply done by BGP unicast session between Edge-AS1 and Edge-AS2 (this helps avoid anotehr instance of IGP between edge nodes). As mentioned by default only VPNv4 session assign and adveritise label while the session between Edge-AS1 and Edge-AS2 is IPv4 Unicast. So we need to explicitly mention "send-label".
All VPNv4 prefixes from PE nodes will be advertised to RR and in turn will be advertised to RR-AS2. eBGP will set the nexthop as self before advertiing. To overrule this, we use "nexthop-unchanged".
When VPN1 prefix is adverised by PE1-AS1 to RR-AS1, it set nexthop as self. RR-AS1 while advertising to RR-AS2 will NOT change teh nexthop (due to nexthop-unchanged). RR-AS2 will inturn advertise to PE1-AS2 without changing the nexthop (follows traditional iBGP behaviour).
PE1-AS2 will have in its local table the label advertised by PE1-AS1 and push it as bottom label. On top of it, it include the label to reach PE1-AS1 whcih was advertised by Edge-AS2 and middle label and top of it the IGP label to reach Edge-AS2.
HTH,
Nagendra

Iphone 5 excessive cellular data usage

I am a new iPhone user and I am a bit concerned for how fast my phone burns through data. I have an iPhone 5, ios 7.0.4, and my cellphone provider is Fido in Canada (May be irrelevant info). I manually turn cellular data off whenever it's not in use. At times where I use wifi (which is about 98% of the time), I never leave cellular data on at the same time. So, I have 2 issues:
1) In system services under Cellular data usage, "iTunes Accounts" seems to be the top user of data. I looked at some previous discussions on this matter and many have said that turning off iCloud would do the trick, as well as turning off 'push'. However, I have never had my iCloud account nor "iTunes and App store," logged on. I have 'updates' and 'use cellular data' turned off as well for this feature. On top of that, under "Mail, Contacts, and Calendars' I have Fetch New Data set as 'hourly' instead of "Push". So why is it that my under system services, 'iTunes Accounts" still jumps up a few hundred kb whenever I DO have cellular data turned on.
2) How much data does the Facebook App use? Lets say I turn cellular data on, then I open up the Facebook App, and I scroll down my news feed. I do not select any pictures, videos, or profiles. I then check my data usage and somehow I burned 4mb on this specific app! I understand images take up more usage but I find that a bit suspicious.
Of course, this isn't the only app that seems to be hogging data. It's just amazing how other phone users (iphones and android users) can just leave their data on without their data randomly draining.

You are welcome
Usually data consumed by system services is on the higher side.
I would suggest reseting the data counter and then checking again after few hours to know the real culprit.
To reset the counter, there's an option "Reset Statistics", just under the list we discussed before.
This way you would get to know which app is using your data righ now.

Gather_table_stats and AWR

Hi all,
i would like to disable automatic gathering of table statistics with dbms_scheduler.disable(name => 'SYS.GATHER_STATS_JOB'), because we like to gather statistics every time immediatly after we batch load our tables in our data warehouse. Is it right that this job is also needed for AWR and that oracle will not save system statistics once per hour if i disable this job?
Database version is 10gR2.
Thanks,
Robert

user1367414 wrote:
Hi all,
i would like to disable automatic gathering of table statistics with dbms_scheduler.disable(name => 'SYS.GATHER_STATS_JOB'), because we like to gather statistics every time immediatly after we batch load our tables in our data warehouse. Is it right that this job is also needed for AWR and that oracle will not save system statistics once per hour if i disable this job?
Database version is 10gR2.Robert,
the recommended way to disable automatic statistics collection on the non-Oracle objects in 10g is:
exec DBMS_STATS.SET_PARAM('AUTOSTATS_TARGET', 'ORACLE')
This way the job still gets executed but collects only statistics on the dictionary / AWR / etc. (owned by Oracle) tables. If you disable the job completely, your dictionary statistics might get outdated, potentially leading to suboptimal dictionary performance.
By the way:
"Oracle Database 10g uses a scheduled job, GATHER_STATS_JOB, to collect AWR statistics."This is a bit misleading, the job's purpose is to collect object statistics, as already mentioned the AWR snapshots are controlled differently (and by default are taken every hour, not only during the maintenance windows).
Another way you could handle your requirement would be to lock the statistics of the affected table or schemas by using DBMS_STATS.LOCK_TABLE/SCHEMA_STATS. This way these tables/schemas will be skipped by the default gathering job, and you need then to use the "FORCE=>true" parameter when gathering statistics individually. Note that there is one peculiarity with this approach: If you create/rebuild indexes on a table having the statistics locked, the default option "COMPUTE STATISTICS" of 10g doesn't apply any more, so it doesn't update the statistics of the index automatically in the dictionary, and there is unfortunately no "force" parameter available in the CREATE/ALTER INDEX command. You would need to either temporarily unlock the statistics or gather the index statistics separately (which means additional work for the database).
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/
Edited by: Randolf Geist on Jan 18, 2009 12:17 PM
Added note about lock statistics approach

Inter-AS option B statistics

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