Two tunnels, two different mtu values, no OSPF adjacency

Hi all,
Well this is an interesting one, i have a tunnel configured between two 2921 routers that used to work just fine, we had an management access issue on one of the routers and it had to be rebooted, all looked fine until one of OSPF adjacencies didn't come up, the one across the tunnel in question, ran a dubug and saw;
Apr 10 2015 09:58:30.319 AEST: OSPF-100 ADJ Tu100: Nbr 10.0.6.12 has larger interface MTU
OK, so i check both ends of the tunnel, MTU different;
bne-rt01#sh int tunn 100
Tunnel100 is up, line protocol is up
Hardware is Tunnel
Internet address is 10.0.3.62/30
MTU 17874 bytes, BW 204800 Kbit/sec, DLY 50000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 10.255.255.1 (GigabitEthernet0/1/0), destination 10.255.255.5
Tunnel Subblocks:
src-track:
Tunnel100 source tracking subblock associated with GigabitEthernet0/1/0
Set of tunnels with source GigabitEthernet0/1/0, 2 members (includes iterators), on interface <OK>
Tunnel protocol/transport GRE/IP
Key disabled, sequencing disabled
Checksumming of packets disabled
Tunnel TTL 255, Fast tunneling enabled
Tunnel transport MTU 1434 bytes
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Tunnel protection via IPSec (profile "PTQ-IPSEC-PROFILE-2")
Last input 00:00:02, output never, output hang never
Last clearing of "show interface" counters 27w0d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 103048
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
2526404 packets input, 944901813 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
2701610 packets output, 706777352 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
brn-rt01#sh int tunn 100
Tunnel100 is up, line protocol is up
Hardware is Tunnel
Description: PIPE_Backup
Internet address is 10.0.3.61/30
MTU 17866 bytes, BW 204800 Kbit/sec, DLY 50000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation TUNNEL, loopback not set
Keepalive not set
Tunnel source 10.255.255.5 (GigabitEthernet0/1/0), destination 10.255.255.1
Tunnel Subblocks:
src-track:
Tunnel100 source tracking subblock associated with GigabitEthernet0/1/0
Set of tunnels with source GigabitEthernet0/1/0, 2 members (includes iterators), on interface <OK>
Tunnel protocol/transport GRE/IP
Key disabled, sequencing disabled
Checksumming of packets disabled
Tunnel TTL 255, Fast tunneling enabled
Tunnel transport MTU 1426 bytes
Tunnel transmit bandwidth 8000 (kbps)
Tunnel receive bandwidth 8000 (kbps)
Tunnel protection via IPSec (profile "PTQ-IPSEC-PROFILE-2")
Last input 00:00:00, output never, output hang never
Last clearing of "show interface" counters 01:04:19
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1
Queueing strategy: fifo
Output queue: 0/0 (size/max)
5 minute input rate 3000 bits/sec, 1 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1723 packets input, 1069064 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
962 packets output, 91128 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
checked the IP MTU, different;
bne-rt01#sh ip int tunn 100
Tunnel100 is up, line protocol is up
Internet address is 10.0.3.62/30
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1434 bytes
brn-rt01#sh ip int tunn 100
Tunnel100 is up, line protocol is up
Internet address is 10.0.3.61/30
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1426 bytes
Checked the source interfaces MTU, same;
bne-rt01#sh int gi0/1/0
GigabitEthernet0/1/0 is up, line protocol is up
Hardware is EHWIC-1GE-SFP-CU, address is 442b.03e5.8870 (bia 442b.03e5.8870)
Description: OPTUS IPVPN WAN
Internet address is 10.255.255.1/30
MTU 1500 bytes, BW 204800 Kbit/sec, DLY 10 usec,
brn-rt01#sh int gi0/1/0
GigabitEthernet0/1/0 is up, line protocol is up
Hardware is EHWIC-1GE-SFP-CU, address is 5057.a819.3620 (bia 5057.a819.3620)
Description: OPTUS IPVPN WAN
Internet address is 10.255.255.5/30
MTU 1500 bytes, BW 204800 Kbit/sec, DLY 10 usec,
Checked IP MTU on source, same;
bne-rt01#sh ip int gi0/1/0
GigabitEthernet0/1/0 is up, line protocol is up
Internet address is 10.255.255.1/30
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
brn-rt01#sh ip int gi0/1/0
GigabitEthernet0/1/0 is up, line protocol is up
Internet address is 10.255.255.5/30
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
below is the configuration of the physical source;
bne-rt01#sh run int gi0/1/0
Building configuration...
Current configuration : 209 bytes
interface GigabitEthernet0/1/0
description OPTUS IPVPN WAN
bandwidth 204800
ip address 10.255.255.1 255.255.255.252
ip traffic-export apply WAN-Traffic-capture size 1000000
duplex auto
speed auto
end
brn-rt01#sh run int gi0/1/0
Building configuration...
Current configuration : 209 bytes
interface GigabitEthernet0/1/0
description OPTUS IPVPN WAN
bandwidth 204800
ip address 10.255.255.5 255.255.255.252
ip traffic-export apply WAN-Traffic-capture size 1000000
duplex full
speed 1000
end
below is the configuration of the tunnel interfaces;
bne-rt01#sh run int tunn 100
Building configuration...
Current configuration : 245 bytes
interface Tunnel100
bandwidth 204800
ip address 10.0.3.62 255.255.255.252
ip flow ingress
ip flow egress
tunnel source GigabitEthernet0/1/0
tunnel destination 10.255.255.5
tunnel protection ipsec profile PTQ-IPSEC-PROFILE-2 shared
end
brn-rt01#sh run int tunn 100
Building configuration...
Current configuration : 270 bytes
interface Tunnel100
description PIPE_Backup
bandwidth 204800
ip address 10.0.3.61 255.255.255.252
ip flow ingress
ip flow egress
tunnel source GigabitEthernet0/1/0
tunnel destination 10.255.255.1
tunnel protection ipsec profile PTQ-IPSEC-PROFILE-2 shared
end
To be honest i'm a bit lost as to the reason, any ideas guys?
regards
warren

Hi Warren,
According to this thread:
https://supportforums.cisco.com/discussion/11305311/understanding-mtu-given-gre-tunnel
the first displayed MTU of over 17000 bytes (let's call it simply tunnel MTU as opposed to the tunnel transport MTU) is computed from platform buffer sizes. I suspect that the memory-size iomem command may have something to do with this. Without this command, the router decides how much memory to set aside for packet buffers depending on the installed interfaces and network modules - and of course, based on the IOS version as well, as this automatic IOMEM sizing is performed by the IOS when booting, and different IOSes may do things differently. With this command configured, a fixed percentage of RAM can be reserved. Could something of this have changed between reboots - a different IOS version, perhaps, or adding/removal of this command, or change in installed network modules and interfaces?
Nonetheless, the difference between the tunnel MTUs (8 bytes) seems to correspond to the difference between the tunnel transport MTUs and IP MTUs. Somehow, the change in the tunnel MTU could have affected the resulting tunnel transport MTU.
Yet another question is whether the IPsec policy (transform set, key sizes, etc.) is identical to the IPsec policy before the reload. If my memory serves me, in IPsec, if two peers have identical but differently ordered ISAKMP and IPsec policies, the resulting IPsec operation depends on who first started the ISAKMP negotiation (the idea is: the initiator of the IPsec tunnel proposes all its ISAKMP, and afterwards, all its IPsec policies, and the target of the IPsec tunnel chooses the first one that matches one of its policies). If by any chance the configuration of ISAKMP policies, IPsec transform sets, etc. is not letter-identical on this router and the other endpoint, it is possible that the router now operates the IPsec differently than before the reload, which could affect the overall overhead, and thereby the tunnel transport MTU as well.
In any case, with tunnels, it is my strong recommendation to configure a conservatively low MTU manually. With IPsec-protected GRE tunnels over IPv4, the recommended manual MTU is 1400 and so the TCP MSS should be clamped to 1360. The recommendation for MTU of 1400 is taken from this document:
http://www.cisco.com/c/en/us/support/docs/ip/generic-routing-encapsulation-gre/25885-pmtud-ipfrag.html#t16
I would personally suggest configuring the MTU manually on all your tunnels to 1400. This will both provide for a reasonable reserve in case your own ISP uses some additional overhead to carry your packets, and at the same time, it will prevent your routers from automagically (and obscurely) changing your tunnel transport MTUs between restarts.
Best regards,
Peter

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version details
SQL> SELECT *
2 FROM V$VERSION;
BANNER
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
PL/SQL Release 11.1.0.7.0 - Production
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ca_id               fac_id          column_name          previous name          after_modification
CA2001/11/0002          FA000008     BRWR_SHORT_NAME          Nandu               SHIJU
CA2001/11/0002          FA000008     sic_code          1234               456My approach
select      ca_id,fac_id,column_name,
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                         lead(sic_code,1) over(partition by ca_id,fac_id) ld_sic,
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=============
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Hi,
Thanks for posting the CREATE TABLE and INSERT statements; that really helps!
Here's one wa. Like your 2nd approach, this uses a self-join:
WITH     got_r_num     AS
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,     unpivoted_data     AS
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--                        , ...     -- Other columns
SELECT       p.ca_id
,       p.fac_id
,       p.column_name
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,       a.txt          AS after_modification
FROM       unpivoted_data   p
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;To include other columns, add them in the 2 places where I put the comment "Other columns".
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...     UNPIVOT     INCLUDE NULLS
          (    txt
          FOR column_name IN ( brwr_short_name          AS 'BRWR_SHORT_NAME'
                             , TO_CHAR (sic_code)     AS 'SIC_CODE'
          )I got the error "ORA_00917: missing comma" right after TO_CHAR. Perhaps someone else can show how to eliminate one of the sub-queries.

How to compare pixel values of two different grayscale images...

I have two different grayscale images both of much different sizes. One is 46x20 pixels and the other is 2592x1944 pixels. I'm having trouble finding a way to "scan" the smaller image through the larger one so that comparisons between the pixel values can be made. Basically I'm trying to see if anything matches the smaller image in the big image semi-closely. I can access the pixel values of each image but I can't figure out an algorithm to perform the scan. Any help at all would be very much appreciated! Thanks.

Hi
recipe:
1.
Find all the values for all the pixels in the small image. Some might be similar. Put all those values that are useful into a List called comparisonList.
2.
For each scanline in the large image
For each pixel in the scanline
is this pixel the same value as a pixel in the comparisonList?
if so do something
is the scanline finished?
if not next pixel
loop to next scanline
where scanline is a horizontal line in the big picture.
my 2c
hope helps

Is it possible to build two different L2TP/IPSec tunnels per subnet or per user?

Dear colleagues
I wondered whether anyone could help with this one.
Is it possible to build two different L2TP/IPSec tunnels per subnet or per user on a Cisco router or any other third party manufacturer? The idea behind is to allow different access to resources to different support technicians. Your help is much appreciated.

Sure, the ASA can use LDAP/AD information to select what access list should be applied for that specific user or group of users logging into the VPN. You can use whats called DAP or just LDAP Attribute Maps.

Generally when creating a Word file from either a Mac or Win7 pc and opening it on two different machines (either one first) it always prompts that the file is open and will be opened as read only. However opening a CSS file does not prompt that it is alr

Generally when creating a Word file from either a Mac or Win7 pc and opening it on two different machines (either one first) it always prompts that the file is open and will be opened as read only.
However opening a CSS file does not prompt that it is already open on or from any machine which is causing code edits to be lost.
What we found from out testing:
- The file can be saved from one user to the server and WILL NOT PROMPT on other machines until the saving machine has the Dreamweaver program closed completely
- The file can be closed and Dreamweaver minimised to the launch bar but it still will not register on other machines that it has been changed.
- Also, until the Dreamweaver program is closed on the machines, it will continue to open it's saved version of the file.
Example Scenario:
- User 1 opens test.css (which is 2000 lines) and adds some code to the end of the file to bring it up to 2500 lines
- Meanwhile User 2 opens test.css as well (opens as 2000 lines as User 1’s edits have not yet been saved) and adds in code to bring it to 2300 lines
- User 1 saves his file and closes it - but Dreamweaver is still open.
- User 2 also saves his file and leaves Dreamweaver open.
- The server will report the size and last edit of the file the same as User 2 as he was the last person to save it (and if you open from the Win7 Machine it will show as User 2’s 2300 line version)
- If User 1 then open's the file again (from either the 'recent' in Dreamweaver OR clicking on the file directly in Finder...which version opens.... The version that User 1 saved! Not the true version on the server, but the version that User 1 edited and saved with 2500 lines in it.
- Same for User 2, he will open 'his' version with 2300 lines in.
Other information:
- Files are opened directly from the server
- Sometimes the users will save incrementally and re-open
- Most of the time users will save incrementally and keep the files open
- The users will never not save incrementally and just save when closing the file once finished
- The users are usually working on the files all day
- It is always the bottom lines of code that are lost. It could be a case of the two versions being mixed up and cutting off the newly added lines based on the line count (possibly).
It is as if Dreamweaver is holding a cache of the version locally and then only properly looking back to the server when it has been completely closed. It is very difficult to see how the server is causing such an impact on these files, there are very few logs which are giving any indication to the root cause of the problems.
Anyone know if this is a known issue?
Is there a way that there can be a featured implemented on the server that doesn't allow another user to open a file if it is already open on another machine?
Thanks

Your server file handling has nothing, and really nothing to do with Adobe software. If files don't get locked for (over-)writing and/or lose connection to the program opening them, then your server is misconfigured. It's as plain and simple and that. Anything from "known file types"/ file associations not being set correctly, MIME types being botched, crooked user privileges and file permissions, missing Mac server extensions, delayed file writing on the server, generic network timeout issues and what have you. Either way, you have written a longwinded post with no real value since you haven't bothered to provide any proper technical info, most notably about the alleged server. Either way, the only way you can "fix" it is by straightening out your server and network configuration, not some magic switch in Adobe's software.
Mylenium

How to enter invoice with two different tax codes in one line?

Dear friends,
I have this PO for which I enter the invoice.
I recieve later a subsequent debit for this PO from the transporter. This subsequent invoice has got extra debits, one with 21% VAT and one with 19% VAT, which means two items with two different tax codes.
I want to enter this subsequent debit for each item of the PO, and I want to enter both debits in every item of the PO.
How can I enter in one row in MIRO a debit with two different tax codes.
Thank you.

I want in the same line item to enter two tax codes.
Do you Know if there is any way to do this?
It is a subsequent debit and it has two items with two different tax codes. I want to enter the subsequent debit for a PO with many items and enter the value of the whole subsequent invoice. So there is the need to enter one line item with two tax codes.
How can this be done?
Thank you?

I am trying to store music for two different iPods on the same computer, against two different Apple IDs. When I try and download content from the Cloud I get an error message?

I am trying to store music for two different iPods on the same Windows 8 computer, and when I try and download content from the Cloud I get an error message. Is it possible to have two different Apple IDs on the same computer?

Unfortunately you've discovered too late how important it is to maintain an up-to-date backup of your iTunes library (and all other data of value). You could, before wiping the drive, have considered making use of a commercial data recovery service that could (albeit at considerable cost) have extracted your library from the hard disk, even if virus infected.
In the absence of that option, you will need to restore the content of your library from its original sources:
Depending on your location, you may be able to re-download any iTunes Store purchases that are still available on the Store
Likewise, most digital purchases from Amazon (including auto-rip copies of purchased CDs) should be available from the Amazon Cloud and via the Amazon Music application - the same may be true of other commercial sources for digital downloads
Content imported from your CDs will have to imported again
The specific situation that you describe regarding the music imported from your friend's external HDD suggests that either the source is badly organized and/or originates from a source other than iTunes (other media players may use alternative tags for information like artist, title, album, etc. that are not wholly consistent with how iTunes handle these). Without details of the issues you're seeing it is difficult to suggest a remedy other than going through the media album-by-album, track-by-track, and correcting the inconsistencies.
In the absence of a backup or access to the original library data there is no option other than painstakingly recreating your library as described above. As you do so, you'll now realize how important creating and maintaining backups are - in my case I have at all times three separate duplicates of my library, in two different locations, where none is ever more than a week old compared to the content of my master library.

Use two different printer services in one web template?

Hi!
Is it possible to use two different help services for printing in the same web template (for the same table item)?
Print1:
<param name="HELP_SERVICE" value="HELP_SERVICE_PRINT"/>
<param name="HELP_SERVICE_CLASS" value="ZCL_RSR_XLS_HELP_WINDOW_PRINT"/>
Print 2:
<param name="HELP_SERVICE" value="ZPRINTING"/>
<param name="HELP_SERVICE_CLASS" value="ZBW_PRINT_HELP_SERVICE"/>
I was thinking that you maybe could change the param name values for the "Help_service" and the "help_service_class" at runtime using the properties for the table item, so that you could choose which one to use, but I havne't been able to do that so far.
Does anyone have an idea?

This is not a problem. Just put the print service for the print to excel on an object other than the table web item. As long as these print services exist on any web item, you should be able to invoke them. I've tested this with putting the "Print with Excel" service on the Navigation Block Web Item and the other print service on the table web item. Hope that helps!
Prakash

How to define namespace with one XSD using in two different DB-Locations ?

I'm not clear,How to define namespace, targetnamespace, schemaLocation or NoNamespaceSchemaLocation
when using one common schema.xsd-definition
in two different database-locations for exchange xml-documents?
when insert xml-document I've got an error ORA-30937
do you have an good exsample ?
thanks
Norbert
schema :
<xs:schema
xmlns="http://sourcehost.com/namespace"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:oraxdb="http://xmlns.oracle.com/xdb"
targetNamespace="http://sourcehost.com/namespace"
xml-document :
xmlns="http://Sourcehost.com/namespace"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:SchemaLocation="http://sourcehost.com/namespace http://desthost:8080/sys/schemas/PUBLIC/ADRESSEN.XSD">
SQL> insert into ADRESSEN values
(XMLType
(bfilename ( 'XMLIMPORT_DIR', 'adressen.xml')
, 0 )
--> error :
ORA-30937: No Schemadefinition for "SchemaLocation" (Namespace "http://www.w3.org/2001/XMLSchema-instance") in übergeordnetem Knoten "/ADRESSEN"

Norbert
The schema location used to register the XML schema with XML DB does not need to be a valid URL for accessing the XML Schema
I can use the same URL , for instance
http://xmlns.example.scom/xsd/myXMLSchema.xsd
on machines dbserver1, and dbserver2. The only reason some people choose to use the hostname / portnumber convention is that this makes it possible to validate the XML Instance documents against the copy of the XML schema stored in the XML DB repository using an external tool like XMLSpy without have to add entries to XMLSpy's OASIS catalog files.
I am concerned about the message you are getting. That's not correct AFAICT but I'd need to see the complete XML Schema and Instance to be sure.

Two tunnels, two different mtu values, no OSPF adjacency

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