L2 Vlan over L3 link

Hi
Please see attachment for my setup. So I have 2 sites which are approx half a mile apart. The ISP has provided 2 circuits, one at each site and these are meant to be acting as a Active/Standby circuit for which they will use HSRP. They have asked us to provide a layer 2 link on which they will run their HSRP Vlan.
We currently have spare fiber running between the 2 sites so no issues there. We are trying to work out how to provide this L2 link. It was suggested by someone to put a switch at each site and use one of the spare fibers to connect into these switches to provide the L2 link, the or router and ISP router can connect into these switches.
The issue is the customer does not want to provide the 2 switches so I was thinking if there is any alternative. The uplinks from my core switches at each site are routed links. Is there any was on running a L2 vlan down those links and across the core switches?
Thanks

I hope others will answer this question as well but it comes back to allowing internet traffic via your core without going through the firewall as previously discussed.
If you want to do that then yes simply run cables via your core but it is, as I said before, a really bad idea.
As soon as you use your core switches for that vlan you are exposing your internal network to the internet.
So the answer is yes it can be done but it is not a secure or safe way to do it.
As I said before all these issues could be solved by simply asking the ISP for a new address block for site 2. Your internal servers wouldn't be accessible if site 1 goes down but you said that is not important.
If they insist on running HSRP and you cannot purchase the switches then the only other way is to use the core switches but I wouldn't do it.
Jon

Similar Messages

Multiple VLANs over 1300 series bridges

Hi
I am looking to connect a small external building to a main campus building by wireless bridge. The building i want to connect currently has two vlans, can the 1300 series bridges carry multiple vlans over the wireless bridge link? If so can anyone point me towards s document that explains it?
Many thanks
Simon

Hi Simon,
Yes they can, here is a link, i hope it helps you, look at the "Bridge configuration" title.
http://www.cisco.com/en/US/products/hw/wireless/ps4570/products_configuration_example09186a00801d0815.shtml
Regards,
Milton Tizoc.

Vlans over wan

Is it possible to run a vlan over a wan link on my router ?

Yes, but don't do it......
There shouldn't be any reason for you to 'Bridge' over the WAN. Use Layer-3 and route your traffic.
Andy

Vlan over wireless bridge with internet sharing?

Hi Community, my first post here, hoping somebody may be able to advise...
I live on a farm which is too far for broadband but fortunately I also have an office in a nearby town and because I have line of sight I have setup a wireless bridge, this gives me 8 MBits which is wonderful. Some of my equipment, for example a NAS is on the farm, and I need to access them from the office via the wireless link and I occasinally use vnc to access my office desktop from the farm. This all works beautifully.
Ok. now I want to share my internet with my neighbor on the farm, who, in a strange twist also rents an office next to mine downtown, so I would like to give him access to the internet and to his equipment he has there too.. but I don't want him to be able to access my equipment and visa versa I don't want to see his stuff...
This sounds like a job for port based VLAN.. and so what I bought is two Linksys/Cisco SLM2005 layer2 switches in the hope that this would allow me to do what I want... but I'm not so sure now. In the office I use a draytek v2910 which has a vlan feature that allows me to separate the ports from each other, only giving them internet access.
So... if I connect these two switches to each other, and I create a VLAN with the same id on each of the switches, will the corresponding vlans be shared, so, if you assume the following hardware setup:
farm: slm2005 switch
port 1 -> wireless bridge to office: member of vlan "2", "3"
port 2 -> access point A for neighbor: member of vlan "2"
port 3 -> my own access point B: member of vlan "3"
office: slm2005 switch
port 1 -> wireless bridge to farm: member of vlan "2", "3"
port 2 -> access point C for neighbor: member of vlan "2"
port 3 -> my access point for office D: member of vlan "3"
port 4 -> router port 1: member of vlan "2"
port 5 -> router port 2: member of vlan "3"
the router (draytek v2910) is configured in such a way to separate port 1 and port 2 (otherwise there would be a loop...)
The idea here is to create a vlan "2" for my neighbor and "3" for myself. but what's the correct way to consider the wireless bridge inbeetween (in fact, I think the same problem would occur if I just connected the two switches with a cable (if i had a 2 mile long one..)...)
Will my neighbor be able to see both access points "A" and "C" and the internet, but not be my access points "B" and "D"? Or does this whole concept of VLAN over bridge not work like this, or not at all?
Thanks in advance for any advice,
Andres

Hi Andreas,
you're not far from it.
Your whole concept is ok. What you just need is on the gateway of each subnet (I would presume it's the router in the office) to create an access list preventing to route between vlan 2 and 3.
On all other devices, traffic can't jump between vlans. But on a routing device that has the Vlan layer3 interfaces, traffic is routed between vlans so that's where you need to prevent it.
With regards to vlans over wireless, you're also having the good concept. The point is to have only 1 ssid, that will be in a certain vlan, but also bridging the other vlans onto that ssid.
This doc should help you out :
http://www.cisco.com/en/US/partner/products/hw/wireless/ps4570/products_configuration_example09186a00801d0815.shtml#vlanbr
HTH,
Nicolas
Thanks to rank the answer if you see it as useful !

Execute procedure over db link

I am trying to execute a stored procedure over database link and I get the following error
DBMS_APPLY_ADM.SET_UPDATE_CONFLICT_HANDLER@DBCS(
ERROR at line 12:
ORA-06550: line 12, column 2:
PLS-00306: wrong number or types of arguments in call to 'SET_UPDATE_CONFLICT_HA
NDLER'
ORA-06550: line 12, column 2:
PL/SQL: Statement ignored
However when I execute the same peice of code by logging on to the server the code executes successfully. "DBCS" is the database link name.
CODE which I am executing over DB LINK
DECLARE
COL_NAME DBMS_UTILITY.NAME_ARRAY;
CURSOR C1 IS
SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS WHERE OWNER='SCOTT' AND TABLE_NAME='DEPT';
BEGIN
OPEN C1;
FETCH C1 BULK COLLECT INTO COL_NAME;
CLOSE c1;
DBMS_APPLY_ADM.SET_UPDATE_CONFLICT_HANDLER@DBCS(
OBJECT_NAME => 'SCOTT.DEPT',
METHOD_NAME => 'OVERWRITE',
RESOLUTION_COLUMN => COL_NAME(1),
COLUMN_LIST => COL_NAME);
END;
CODE without DB LINK (executed this on db where db link is pointing too.
DECLARE
COL_NAME DBMS_UTILITY.NAME_ARRAY;
CURSOR C1 IS
SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS WHERE OWNER='SCOTT' AND TABLE_NAME='DEPT';
BEGIN
OPEN C1;
FETCH C1 BULK COLLECT INTO COL_NAME;
CLOSE c1;
DBMS_APPLY_ADM.SET_UPDATE_CONFLICT_HANDLER(
OBJECT_NAME => 'SCOTT.DEPT',
METHOD_NAME => 'OVERWRITE',
RESOLUTION_COLUMN => COL_NAME(1),
COLUMN_LIST => COL_NAME);
END;
Please guide.

orausern wrote:
Hi,
We are on Oracle 11.2.0.2 on Solaris 10. I have two databases on this version of Oracle. From one db I have execute a stored procedure via db link to another database. The store procedure has dynamic sqls (execute immediate) and it uses commit statement as part of the code. Is it alllowed to execute this procedure over db link? I am not aware on the implications on stored proc execution over db link and will be thankful for help.
Thanks,if no error is thrown, why are you looking for problems where none exist?

Interactive report performance problem over database link - Oracle Gateway

Hello all;
This is regarding a thread Interactive report performance problem over database link that was posted by Samo.
The issue that I am facing is when I use Oracle function like (apex_item.check_box) the query slow down by 45 seconds.
query like this: (due to sensitivity issue, I can not disclose real table name)
SELECT apex_item.checkbox(1,b.col3)
, a.col1
, a.col2
FROM table_one a
, table_two b
WHERE a.col3 = 12345
AND a.col4 = 100
AND b.col5 = a.col5
table_one and table_two are remote tables (non-oracle) which are connected using Oracle Gateway.
Now if I run above queries without apex_item.checkbox function the query return or response is less than a second but if I have apex_item.checkbox then the query run more than 30 seconds. I have resolved the issues by creating a collection but it’s not a good practice.
I would like to get ideas from people how to resolve or speed-up the query?
Any idea how to use sub-factoring for the above scenario? Or others method (creating view or materialized view are not an option).
Thank you.
Shaun S.

Hi Shaun
Okay, I have a million questions (could you tell me if both tables are from the same remote source, it looks like they're possibly not?), but let's just try some things first.
By now you should understand the idea of what I termed 'sub-factoring' in a previous post. This is to do with using the WITH blah AS (SELECT... syntax. Now in most circumstances this 'materialises' the results of the inner select statement. This means that we 'get' the results then do something with them afterwards. It's a handy trick when dealing with remote sites as sometimes you want the remote database to do the work. The reason that I ask you to use the MATERIALIZE hint for testing is just to force this, in 99.99% of cases this can be removed later. Using the WITH statement is also handled differently to inline view like SELECT * FROM (SELECT... but the same result can be mimicked with a NO_MERGE hint.
Looking at your case I would be interested to see what the explain plan and results would be for something like the following two statements (sorry - you're going have to check them, it's late!)
WITH a AS
(SELECT /*+ MATERIALIZE */ *
FROM table_one),
b AS
(SELECT /*+ MATERIALIZE */ *
FROM table_two),
sourceqry AS
(SELECT b.col3 x
       , a.col1 y
       , a.col2 z
FROM table_one a
    , table_two b
WHERE a.col3 = 12345
AND   a.col4 = 100
AND   b.col5 = a.col5)
SELECT apex_item.checkbox(1,x), y , z
FROM sourceqry
WITH a AS
(SELECT /*+ MATERIALIZE */ *
FROM table_one),
b AS
(SELECT /*+ MATERIALIZE */ *
FROM table_two)
SELECT apex_item.checkbox(1,x), y , z
FROM table_one a
    , table_two b
WHERE a.col3 = 12345
AND   a.col4 = 100
AND   b.col5 = a.col5If the remote tables are at the same site, then you should have the same results. If they aren't you should get the same results but different to the original query.
We aren't being told the real cardinality of the inners select here so the explain plan is distorted (this is normal for queries on remote and especially non-oracle sites). This hinders tuning normally but I don't think this is your problem at all. How many distinct values do you normally get of the column aliased 'x' and how many rows are normally returned in total? Also how are you testing response times, in APEX, SQL Developer, Toad SQLplus etc?
Sorry for all the questions but it helps to answer the question, if I can.
Cheers
Ben
http://www.munkyben.wordpress.com
Don't forget to mark replies helpful or correct ;)

Report over database link error

Good morning all.
I have a database link LINKA from USERA on LOCALSERVER to USERB on REMOTESERVER.
(create database link LINKA connect to USERB identified by mypassword using validtns)
In USERC on REMOTESERVER I have a TABLEX, with grant all on TABLEX to USERB on REMOTESERVER.
In USERB on REMOTESERVER I have a view TABLEXV, select * from USERC.TABLEX
From USERA on LOCALSERVER I can select * from TABLEXV@LINKA. In fact I can insert/update/delete tablexv from USERA.
I also have a view TABLEXV on USERA, select * from TABLEXV@LINKA. I can also select/insert/update/delete from USERA.TABLEXV.
So far so good - all working as expected.
Then, my APEX app on LOCALSERVER, interactive report, parsing schema USERA, querying TABLEXV, I get the following:
when "Exclude Link Column", I get the error "The requested URL /pls/apex/f was not found on server.
when "Link to Single Row View", report displays correctly.
when "Link to Custom Target", I get the error "The requested URL /pls/apex/f was not found on server.
When I run the select * from TABLEXV as a regular report (i.e. not interactive), I also get the error.
So the only time I get the report displayed correctly is using IR and "Link to Single Row View".
However, clicking on the link (for Single Row View) I get "The requested URL /pls/apex/wwv_flow.show was not found on this server.".
To summarize:
- accessing table via view over database link
- works outside of apex without issue
- inside only works when Link to Single Row View set
- But clicking on link fails
I could live with just having the Link to Singe Row View option if I could disable displaying of the icon so that the user cant click on it.
APEX 3.2.00.27
EE Database - 10.2.0.3 (yes I know out of support)
Remote EE Database - 10.2.0.5
Real object names replaced to protect the innocent!
Anyone got any clues?
I have used remote tables many times in my APEX applications and never had this issue.
Thanks,
Rob @ very confused .com

Good morning all.
I have a database link LINKA from USERA on LOCALSERVER to USERB on REMOTESERVER.
(create database link LINKA connect to USERB identified by mypassword using validtns)
In USERC on REMOTESERVER I have a TABLEX, with grant all on TABLEX to USERB on REMOTESERVER.
In USERB on REMOTESERVER I have a view TABLEXV, select * from USERC.TABLEX
From USERA on LOCALSERVER I can select * from TABLEXV@LINKA. In fact I can insert/update/delete tablexv from USERA.
I also have a view TABLEXV on USERA, select * from TABLEXV@LINKA. I can also select/insert/update/delete from USERA.TABLEXV.
So far so good - all working as expected.
Then, my APEX app on LOCALSERVER, interactive report, parsing schema USERA, querying TABLEXV, I get the following:
when "Exclude Link Column", I get the error "The requested URL /pls/apex/f was not found on server.
when "Link to Single Row View", report displays correctly.
when "Link to Custom Target", I get the error "The requested URL /pls/apex/f was not found on server.
When I run the select * from TABLEXV as a regular report (i.e. not interactive), I also get the error.
So the only time I get the report displayed correctly is using IR and "Link to Single Row View".
However, clicking on the link (for Single Row View) I get "The requested URL /pls/apex/wwv_flow.show was not found on this server.".
To summarize:
- accessing table via view over database link
- works outside of apex without issue
- inside only works when Link to Single Row View set
- But clicking on link fails
I could live with just having the Link to Singe Row View option if I could disable displaying of the icon so that the user cant click on it.
APEX 3.2.00.27
EE Database - 10.2.0.3 (yes I know out of support)
Remote EE Database - 10.2.0.5
Real object names replaced to protect the innocent!
Anyone got any clues?
I have used remote tables many times in my APEX applications and never had this issue.
Thanks,
Rob @ very confused .com

Mouse-over a link

when i mouse-over a link, i can see where that link brings me in the lower left corner. but when i enable the search (shift+f), the links are in the lower RIGHT corner. why? its really embarassing for example on facebook, because the chat windows can be found at the lower right corner, right where are these "links". can i change it some way? thanks in advance!

You can use this extension to change that behavior:
* Status-4-Evar: https://addons.mozilla.org/en-US/firefox/addon/status-4-evar/

Mouse over HTML link causes single frame to display at top of page Netscape only

Having a wierd problem. When you run the mouse over HTML
links on the page a single frame of the flash movie apears at the
top center of the page. It only happens in netscape in firefox
mode. IE, Opera, and Firefox do not have the problem.
Problem site
Thanks in Advance,
Vorsch

The problem goes away if i modify my .css file by removing
the
border: 1px solid #999999;
line from the "a:hover" style.
I ran my css file thru the validator at w3c and its fine. The
Page also validates as xhtml transitional.
and just a note the same file version is on my public server
and my testing server.
Has anyone ever seen this before?? I have several sites with
a:hover effects and flass media and have never run across this
before.

In WebHelp, when I mouse over a link, the font size changes.

Either after I generate to WebHelp or View in RoboHelp, when I mouse over a hyperlink text, the font changes from large to small text. My step is a 11pt font, my body text is 10pt. It appears the 11 pt. font switches to 10pt font when I mouse over it. Any way to fix this?
Also noticed that when I have a note at 9 pt, and mouse over a link, the text changes to 10pt.
So now it appears in most of my topics with links within a step or note. In a body, the text appears fine (or stays the same) when you mouse over a link.

Not believing that either.
You should be able to edit your CSS in a text editor. If you are not sure what to do, set up a simple project using your CSS. Any text will do and create a link.
See the Contact page on my site and follow the instructions there.
See www.grainge.org for RoboHelp and Authoring tips
@petergrainge

I want to know how to get the web addresses to go away that appear in the bottom left corner of the browser every time my mouse goes over a link

Any time that my mouse goes over a link on a web page a little box in the bottom left corner of the browser pops up showing the web address for that link and it is really annoying, especially when i am on facebook because there are so many links on the home page i cant move my mouse anywhere without that box popping up and blocking part of my conversations. I was wondering if there was any way to turn this off. I've checked through the options and to my knowledge there is no way to turn it off. Just wondered if anyone else has had this problem or knew if there was a way to get that box to go away.

Another option would be to use the following extension to push those messages into the status bar. It could be a convenient way to have your messages visible when you want them, but with less distraction.
https://addons.mozilla.org/en-US/firefox/addon/status-4-evar/
If you try it, let us know what you think.

How do I turn on and turn off the pop-up that displays the true URL when I hover over the link?

I would like to know how to set Firefox so it displays the true URL of a link when I hover my mouse over that link.

It's been many moons since I've used a Fireberd, since I'm no longer with the phone company, but if memory serves, that can be turned of directly with a fireberd command. You might check the manual for that. If so, then all you need is a simple "send GPIB" command from Labview
Eric
Eric P. Nichols
P.O. Box 56235
North Pole, AK 99705

My link preview has disappeared from the bottom left of the page (it no longer pops up when I hover over a link.) Thoughts on how to get it back? I really LIKE having it!

My link preview has disappeared from the bottom left of the page (it no longer pops up when I hover over a link.) Thoughts on how to get it back? I really LIKE having it!

It is possible that the screen is too high and that the scroll bar and the find bar and add-on bar fall off at the bottom.
If that works then close Firefox (File > Exit/Quit) to save that setting.
See also:
* http://kb.mozillazine.org/Resizing_oversize_window
If the above didn't help then see:
* http://kb.mozillazine.org/Corrupt_localstore.rdf

Mouse cursor appearing as an arrow instead of a hand over album links

Hi. I've just published my iWeb 08 site on .Mac (using Zone Edit to set up the CNAME for my personal domain, purchased from Last Digital). For some reason, when I hover over the links in the My Albums page, the mouse cursor appears as an arrow instead of the usual hand cursor. This has already confused a few of my testers, as obviously people are conditioned to expect a link where they see a hand. The links themselves work fine, it's just that the mouse cursor makes it look like they're not links. Does anyone know how this can be fixed so that the hand appears when you hover over each image? You can see the page in question here - http://www.paulinelockie.com/Pauline_Lockie/Portfolio/Portfolio.html

That's the way it is.
When you have multiple images in an album, and move the pointer over the album, you see the images displayed.
Since it is not really a link, a pointer is used instead of the hand. It's a design decision.
Send a feedback to the iWeb team.

When I used to move my cursor over a link, it would display the address, that disappeared, how do I get it back on?

When I used to move the cursor over a link, it would display the address of the link in the lower left hand corner before I clicked on it. This has disappeared, how do I turn it back on?
== This happened ==
Not sure how often
== A few months ago

View > Statusbar

L2 Vlan over L3 link

Similar Messages

Maybe you are looking for