VPC Keep-alive link in F1 series Linecards

Hi.
Can we use N7K F1 linecards for vpc keepalive link?
Configure layer 2 portchannel and a point-to-point vlan interface?
thanks

Hi,
This is supported, but as per page 28 of the Best Practices for Virtual Port Channels (vPC) on Cisco Nexus 7000 Series Switches:
Note: If you are using a pure Cisco Nexus F1 Series system or VDC (that is, only F1 line cards used in the chassis or only F1 ports in the VDC), the peer-keepalive link can be formed with mgmt0 interface or 10-Gigabit Ethernet front panel port. In the latter case, use the management command under the SVI to enable it for inband management (otherwise, the SVI is brought down because no M1 modules exist in the system or VDC).
It's probably worth noting the recommendations as to how the peer-keepalive link should be configured:
Strong Recommendations:
When building a vPC peer-keepalive link, use the following in descending order of preference:
1. Dedicated link(s) (1-Gigabit Ethernet port is enough) configured as L3. Port-channel with 2 X 1G port is even better.
2. Mgmt0 interface (along with management traffic)
3. As a last resort, route the peer-keepalive link over the Layer 3 infrastructure
Regards

Similar Messages

Nexus 7000 - Moving vPC keep alive

We have two Nexus 7010 switches running a vPC domain between the two switches. On one of the 7010B, the peer keep alive (from the mgmt VRF) is connected to a 3560B *and* that 3560B also has a data connection back to the same 7010B. Everything is fine with that setup.
Our second 7010A, the peer keep alive link is also connected to a coresponding 3560A switch. However, that 3560A switch is not connected to 7010A.
I want to move the uplink from the 3560A from where it is to the 7010A which will break the keep alive. However, I will not be breaking the vPC peer link as it is a pair of 10G connections between the two 7010 switches.
I have read that the vPC won't come up unless the peer keep alive is present, but it wasn't clear about taking down the keep alive link momentarily. Moving the cable would be quick, but I know the mac table will need to update since 7010B switch will now see the keep alive across it's peer link instead of some other direction.
Can I take the peer keep alive link down providing the peer link stays up?
We are running kickstart and system version 5.0(3).
Thanks!
/alan

Peer keepalive works on UDP port 3200 over IP with 1 sec interval and 5 sec timeout.
Iit is not requirement to have peer-keepalive destination IP in same subnet but if you do not have it in same subnet then you need to make sure you route it properly and your IP routed infrastructure that carries keeplive satisfies above requirement to make sure not a single event cause on that IP infrastructure causes keeplives to loose packets since peer-keepalive is UDP it is not reliable delivery method.
Recommendation in past i heard was to use your managemet ports as peer-keepalive. But one problem happens during ISSU with dual sup, the each supervisor reboots and after it comes up role of active and standby gets switch at the end. So If you did not connect two managment ports(one from each supervisor) to your management network then you will loose keepalives during software upgrade because supervisor switch over occurs and new maangement port becomes active.
So second recomendation is to create one peer-keepalive vrf so that it will have its own address space, if you have M1 1 gig card in each switch then connect one cable between switch and assign IP address (like 1.1.1.1-2/30) and put it in peer-keepalive vrf. With this set up during ISSU you do not loose peer keepalives because line cards does not need to reboot and your peer-keepalive UDP traffic will not depend on any other switch or router.

Which port to use for the peer-keep alive

Hi All,
We have 2 Nexus 6001s in our data center.
The management port of each 6001 is connected to the other and this link is used as the peer keep alive link.
My colleague is suggesting that we use one of the inline data ports as the keep alive link.
Can you please advise on the pros and cons of using management/inline port as keep live link and the best practise to follow in this case?
Thanks,
Pete

Hi Pete,
Here are the best recommendation in order of preference.
1. Use mgmt0 (along with management traffic)
* Pros: whats good on this option is you are totally separating the VPC Peer keepalive link on another VRF (management) and does not mingle with the data or global vrf..
* Cons: VPC PKL is dependent on the OOB management switch.
2. Use dedicated 1G/10GE front panel ports.
* Pros - can just be a direct link between the N6K pair and not dependent on other boxes.
* Cons - you need extra SFPs for VPC PKL while the VPC PKL traffic join the global VRF.
HTH
Jay Ocampo

Is it best practice to use a dedicated link between NX7K pair for keep-alive?

I have been using dedicated physical 10G link between pair of NX7k for keep-alive. Is it a best practice? It seems a waste of 10G ports because keep-alives does not need that much bandwidth.
I'm thinking just configure a dedicated VLAN interface in the default VRF, and have it routed through other devices (fir example 6509 core switches) for keep-alive. Has anyone done that before? The goal is not to use dedicated 10G ports for keep-alive.
Thanks a lot.

gwhuang5398 wrote:I have been using dedicated physical 10G link between pair of NX7k for keep-alive. Is it a best practice? It seems a waste of 10G ports because keep-alives does not need that much bandwidth.I'm thinking just configure a dedicated VLAN interface in the default VRF, and have it routed through other devices (fir example 6509 core switches) for keep-alive. Has anyone done that before? The goal is not to use dedicated 10G ports for keep-alive.Thanks a lot.
I agree that using a Tengig port for this purpose is not efficient. The whole idea of peer-keepalive is to have a way to avoid split brain scenarios in case of peer-link failure. For this reason the peer-keepalives should never cross the peer-link as it defeats the original purpose I just cited. Following are some viable options:
You can use the N7K management ports for peer-keepalive functionality. If you have redundant supervisors then make sure you use an external switch (OOB switch for example) to patch the management ports.
You can use dedicated interfaces just like you are doing right now but that would make more sense if you had Gig ports in my opinion.
You can run peer-keepalives inband but you need to make sure this traffic is never routed over the peer-link. It is considered a good practice to use a dedicated VRF for this purpose.
Atif

E51 SIP and NAT keep alive

I am brad new to the Nokia E seris. I have set up a SIP peer but the problem is trying to call the phne using sip as there seems to be no setting o configure NAT keep alive
Cananyone help or point me?
Thanks
Dave

I Googled up the following:
http://lists.apple.com/archives/Macnetworkprog/2006/Jul/msg00040.html
I am having this issue:
http://discussions.apple.com/message.jspa?messageID=7256265#7256265
Are all these things the same issue?
My ISP "tells me" that they will not allow more than one IP address per account. I have a basic cable modem i.e. not a router. Its a D-Link DCM-202. I have been told to try a level-2 switch but I can't see how that will work. As far as I can see the DCM-202 cable modem is bridging to my AEBS so that is allocated the WAN IP address by the ISP's DHCP server. Does this sound right?
I'd like to create an actual DMZ but since my cable modem only has one port I can't see how I can do that unless I use 2 routers. If I try this I am expecting that I'd have complicated port forwarding configurations no?

Keep alive script for HTTPS service with GET method

Hello,
I tried to implement a keep alive to services that support HTPS connections. Ive created a script that opens a tcp connection on port 443 and tries to do a GET of a test web page. This web page only displays OK.
In a resumed form I used the following script commands:
Socket connect host 192.168.136.134 port 443 tcp
Socket send ${SOCKET} GET /teste.template\n\n
Socket waitfor ${SOCKET} 200 2000
Socket disconnect ${SOCKET} graceful
I was unable to receive the expected 200 response and received a message saying string not found, I used the socket inspect command to inspect the sockets internal data buffer and the result was nothing, it seemed empty.
I tried the same operation using a linux machine that has IP connectivity with the Webservers and I was successful.
In the same CSS I have services configured to respond to HTTP sessions. I tried the following script and everything went well
Socket connect host 192.168.136.151 port 80 tcp
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When I issued the socket inspect command I could in fact see the sockets internal data buffer content.
The CSS is running WebNS 5.0 build 66
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Thanks,
Ricardo Lourenço

Hello,
There is no direct no direct link between TCP and SSL.
So, in spite of having success with the TCP port 443 connection the CSS will not be able to negotiate de security parameters necessary to establish the SSL session.
This was the reason for not having success through the use of the socket commands, as i refered in my original message.
Thanks for your collaboration,
Ricardo Lourenço

Keep alive TCP setting for port 3998 to avoid fw timeout?

Hello,
in our new DS6.1 env, replication between the master DS is using port 3998 through several firewalls. If there are no changes to the DB (we are still testing), the connection seems to time out on the firewall and the status of the remote masters in the SMC drops to "stopped" even though they are still running. If one clicks on the DS entry in the SMC, it seems to set up a fresh TCP connection and the status is ok again.
Is there a way to define a keep-alive setting for these connections ?
TIA,
heinz

DS 6.3 has bug 5087249 against it for the missing SO_KEEPALIVE socket option.
This bug was fixed a long time ago in the DS 5.x series which got "unfortunately lost" on the way
to the 6.x release :-(
If you have a valid Sun Support contract you can request a hotfix for this bug 5087249 in
DS 6.3 (or the soon to be released 6.3.1), by raising a support service request.
A similar missing SO_KEEPALIVE socket option bug exists in the DPS 6.3 server,
bug 6782659 is open against this and if you have a valid Sun Support contract you can
request a hotfix for this bug 6782659 in DPS 6.3 (or the soon to be released 6.3.1).
Without a valid support contract, I'm afraid you'll have to wait until the next official patch
release of both these servers (DPS & DS) after the 6.3.1 which does not contain these 2 fixes.
This will most probably be at least one year into the future from present.
The problem with CLOSE_WAITs DPS issue is fixed in the same hotfix for bug 6782659 (which
contains many connection handling bug fixes/enhancement in addition).
Hope this helps.

Series link and Smart Series

Until Sky stop prefixing programmes with the moniker NEW:, series link and Smart Series will not work because the planner thinks they are another programme. E.g. last night UNDER THE DOME restarted, and was set in my Smart series. Unsurprisingly, it did not record as the programme was called NEW: UNDER THE DOME.,...... Not technical, you can keep on rebuilding your planners all day, but the solution is obvious, except to Sky, no surprise there......

The 'new' issue (which was fixed I think in R010) never stopped programs recordings, it just mixed up the stacks if you had episodes both with 'New' and without. This has been fixed in the majority of cases.
Your issue appears to be entirely different. Did the next episode (ie last night's Falling Skies) appear in the Scheduled Tab at all and fail to record or didn't it put it in after last week's episode?
is correct in that it is up to the channels themselves what constitutes a series. For example, it is the BBC who has decided that the new Top Gear specials being shown are not part of the aborted series, so Sky boxes won't have picked them up automatically.

HFM Web Sever Configuration--Keep Alive and Session Time Out Optimal Config

We recently implemented an HFM 9.3.1 environment. We are using Windows 2003 Enterprise SP2 servers with IIS6. We have two HFM Web servers connecting to an application cluster with two application servers in the cluster. We were getting some errors when trying to unlock HFM cells in Workspace, but we were able to perform the functions fine on the application using the WIN32 client.
I opened a ticket with support and they recommended modifying the subcontext.properties file located in %HYPERION_HOME%\deployments\WebLogic9\servers\Workspace\webapps\workspace\conf. They recommended changing the following settings:
#KeepAliveInterval=30
#SessionTimeout=60
From what I understand, these settings are for the communication between the HFM Web Servers and the application cluster servers. I'm wondering how changing these settings may affect our environment. Are there negative effects and/or trade-offs for changing these settings? Is there a recommended threshold or maximum value?

Hi Dinesh,
This cannot be achieved without development enhancements to some standard SAP framework component, to introduce a "keep-alive" concept. If you are using a CMS for CTI or email integration, you need to ensure it supports keeping the communications session alive also.
Sincerely,
Glenn
Glenn Abel
Covington Creative
www.covingtoncreative.com

How do I delete duplicate songs, but keep a link in their original albums to the single copy of the song left, so it will play in each album in sequence as if it were still there?

Greetings!
After importing my 300 or so CDs into iTunes, I found I have tons of duplicate songs.
Example: I have a song that came in a original album, then in again in a "Greatest Hits" album, then again in a "Hits of the 80's" album, and again in a soundtrack album. I have now have 4 copies of the exact same song.
How do I delete duplicate songs, but keep a link in their original albums back to the single copy of the song left, so it will play in each album in sequence as if it were still there?
I don't think this currently exists, but as my library keeps growing the duplicates keep growing. It would be nice if Apple sees this and adds a way to link songs to multiple albums.
I don't want to create a custom playlist for every album that has a duplicate song or two (I'd have dozens of playlists) - thought about fixing it that way but not really practical.

To my knowledge, there is no way of doing what you want. The only workaround is to create playlists for the other albums containing the track, but that isn't practical for most people.
You could provide Apple with feedback here: http://www.apple.com/feedback/itunesapp.html

Keep-alive problem in apache/weblogic

I have a server with Weblogic 5.1 and Apache
1.3.12 with the weblogic-plugin.
When apache serves pages, the keep-alive works
fine.
When weblogic serves pages, the keep-alive works
fine.
When i added a handler in apache so all requests
to apache should go to weblogic through the
plugin, the keep-alive stopped working.
Anyone seen this before?
Gunnar

send a message to [email protected] with as much info as you can. i d
on't think they're watching the newsgroups for bug reports.
maybe someone who frequents the newsgroups regularly could do a FAQ...
anyone actually got time?
"Gunnar" <[email protected]> wrote in message
news:3a51995e$[email protected]..
In case anyone wondered:
I tried with sp5 and sp7 and everything worked fine. It seems sp6 is
buggy...
Gunnar <[email protected]> skrev i
meldingsnyheter:3a41e618$[email protected]..
I have a server with Weblogic 5.1 and Apache
1.3.12 with the weblogic-plugin.
When apache serves pages, the keep-alive works
fine.
When weblogic serves pages, the keep-alive works
fine.
When i added a handler in apache so all requests
to apache should go to weblogic through the
plugin, the keep-alive stopped working.
Anyone seen this before?
Gunnar

How to keep alive a session in Web Services?

I have to do my project, that will be including some following features:
1. Login to Application through Web Services method. For example:
http://mydomain.com/web-services/Login?WSDL
2. After logging in, use mySms method to send message to Cellphone through Web Services! For example:
http://mydomain.com/web-services/mySms?WSDL
My questions are:
1. How can I keep alive the session after logging in the application in Web Services? In Web, I can use "Session".
2. If someone has not logged in the Application, he/she could not use mySms method for sending Sms. How can I do that?
3. I know, when I invoke a Web Services, one JavaBean has been called, and this bean is persistence with his own states. It means, if I set value to parameters of this bean, these values are persistence for invoked methods by other persons.
For example:
mySms bean has a private field "jid" inited with NULL value.
Person A invoked mySms.
Then, A set jid of mySms to value "A".
Person B invoked mySms. B got jid value. He receive the result value is "A".
The question is, how can I set mySms bean so that mySms bean is not persistence?
Thanks many!

Hi,
I can right away answer your FIRST Question.
Since WebServices are PURELY Based on SOAP which is in tern based on HTTP, they rely on a Stateless protocol.
I am sure you know that the HTTP is the STATELESS Protocol and so you can not maintain Session and so EACH Http REQUEST is considered as a SEPERATE REQUEST.
Now, still you want to maintain the Session in WebServices,
The simple answer is PASSING PARAMETERS.
Just Maintain your Session on Client (If you are using JSPs or Servlets to CAll WEBSERVICES then maintain Session through your HTTPSession) and each time you Invoke WebService PASS ON REQUIRED Parameters.
This Approach is Exactly like your URL REWriting OR your Parameters Passing through QUERY STRINGS.
I hope you got what I am saying!
Take care,
Himanshu/

HT4623 i down loaded ios 6 now my phone wont turn on it has been 2 days and it is really bugging me it keeps saying link to itunes but it wont link itunes asks me to restore the phone and i dont want to loose my info ps i have itunes 10.7

i down loaded ios 6 now my phone wont turn on it has been 2 days and it is really bugging me it keeps saying link to itunes but it wont link itunes asks me to restore the phone and i dont want to loose my info ps i have itunes 10.7

you must restore i would put in dfu mode if it isnt asking to restore when you plug it in

WRT54G v 7.0 -- Setting "Keep Alive: Redial Period" not correct (radio button)

Hi,
I own a Linksys-Router WRT54G v7.0 with firmware v7.00.8 build 008, Jul. 9, 2009.
On the web GUI (Setup/Basic Setup) there's a setting "Keep Alive: Redial Period XX Sec.". As I'd like to stay connected with my provider permanently, I've set the radio button to "Keep Alive: Redial Period" and the according text field to "30" seconds. Then, I've clicked "Save Settings" and got a confirmation message that the settings got saved.
Anyway, even after saving the settings the according radio button is still set to "Connect on Demand...". But that is only true for newer browsers, like e.g. IE8, IE7 or Firefox 8. If you use an older browser, like e.g. IE6, then the radio button is correctly set to "Keep Alive: Redial Period" with a value of "30" seconds.
Conclusion: The settings get correctly saved by the router (I can confirm that), but they don't get correctly shown in the web GUI. Looks like a HTML/Javascript bug in the router's admin web GUI. That's really annoying as you never exactly know the effective settings...
Can someone confirm that bug? Is there a newer firmware than version 7.00.8?
Regards,
Patrick

Try to clear the browser's cache as well.
"Don't fix it if it ain't broken."

How can I keep the links between pages in a PDF file after the file has been saved?

My accounting department has just starting using Adobe Acrobat XI Standard to make our account reconciliations. I like that we can create links between one page and the next, so that we can show our supervisor where the account balances tie to the supporting documentation. But I have noticed the links disappear after my supervisor reviews and signs the PDF file. Is there a way we can keep the links after it is signed? Please note that we are not using EchoSign, just the “place signature” function in Acrobat.

When a document is signed, the signer has the option of locking the document. The links won't be active if the document is locked, so to avoid this, instruct the signer not to lock when signing.

VPC Keep-alive link in F1 series Linecards

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