BGP notification hold time expired

I have 2 eBGP peers over a 64k leased line. One of the peers, say router A 
periodically sends a BGP notification of "hold time expired" to the other 
peer router B and it appears to happen quite randomly.
Whenever this happened, on router B i could actually see a syslog message 
"BGP-3-NOTIFICATION: received from neighbor <router A's IP> 4/0 (hold time 
expired) 0 bytes"
Does this indicate that the link is actually not down (since router B 
received the BGP notification from A)? How then, could router A have missed 
3 consecutive keepalives that router B sent?

I've checked the timers, and the peers negotiated the keepalive to be 10 
seconds, holdown time to be 30 seconds; nothing out of the ordinary here.

Any suggestions?


10/4/2005 2:37:56 PM
comp.dcom.sys.cisco 25313 articles. 0 followers. Post Follow

2 Replies

Similar Articles

[PageSpeed] 50

64k?  Could it be that your BGP updates are swamping that line?


10/4/2005 3:20:09 PM
Hmm . .. good point there.
My debug shows that there's not much else happening after the BGP session 
establishment. There're only a few routes exchanged after BGP session open. 
It's only keepalives and some minor BGP housekeeping traffic thereafter.

Could it be that the actual application data delaying BGP keepalives and 
when tcp is timed out consistently, the peer thinks that it's dead? I might 
have to look into QOS to prioritize the BGP traffic.

"www.networking-forum.com" <steve@spish.net> wrote in message 
> 64k?  Could it be that your BGP updates are swamping that line?
> Regards,
> Steve
> www.networking-forum.com

10/4/2005 3:26:47 PM

Similar Artilces:

Re: Ignoring password history when previous expires/setting expiration time time time
Joseph Huber <joseph.huber@NOSPAM.web.de> wrote on 06/08/2007 05:45:46 AM: > Marcin 'Rambo' Roguski wrote: > > As most of you know, I have a Jensen system now happily running > > 7.3-1. And you probably remember that I have dead clock and > > set date with NTP. > > I would request booting with requesting the time at the console, so at > least a roughly correct date/time is there from beginning. > Set the TIMEPROMPTWAIT system parameter to the appropriate value > 0. > (Use HELp SYS_PARAM TIMEPROMPTWAIT in SYSGEN). > > > Sometimes...

Cisco!! Cisco!! Cisco!!
From http://groups.google.com/group/comp.dcom.sys.cisco/about Top posters This month 18 mer...@geeks.org 11 alagmy 10 bo...@hotmail.co.uk 9 galt...@hotmail.com 9 nom...@example.com 8 troffa...@hotmail.com 8 igor.mamuzicmakni_...@zg.t-com.hr 7 pfisterf...@gmail.com 7 darfun....@gmail.com 6 jfmezei.spam...@vaxination.ca All time 4799 rober...@ibd.nrc-cnrc.gc.ca 2930 aaron@cisco.com 2813 Merv 2370 t...@cisco.com 2356 vcjo...@networkingunlimited.com 1984 b...@cisco.com 1959 bar...@genuity.net 1898 hb...@_nyc.rr.com.remove_ 1745 u...@alp.ee.pbz 1670 bar...@bbnplanet.com -- ...

Track time / Hold time
Hello everybody, In order to calculate the maximum sample rates of my DAQ cards (6220, 6259) I would to have know the "Hold time" and the "Track time" of the following formula: MaxSampleRate = 1/ [HoldTime + (Nc-1)*SettleTime + TrackTime] where Nc is the number channels being sampled Can you tell me where I can find these characteristics ? (They are not in the user manual) Thank you in advance for your help. Labalafre, I notice from your formula that you may be under the impression that DAQ boards have "sample &amp; hold"&nbsp;circuitry on each in...

Which terms include the setup time and hold time in Xilinx ISE timing analysis?
Hello, All, As I understand it, ISE Timing Analyzer does setup time analysis for PERIOD, OFFSET IN and OFFSET OUT constraints as follows: PERIOD slack = (requirement - (data path - clock path skew + uncertainty)) OFFSET IN slack = (requirement - (data path - clock path - clock arrival + uncertainty)) OFFSET OUT slack = (requirement - (clock arrival + clock path + data path + uncertainty)) Q1: My impression is that "setup time" is included in the "data path". Is this correct? If yes, where is this documented? Q2: Which term includes "hold time" in the analysi...

Cisco 857
Hello I have logged in via Telnet on a brand new 857w router with the cisco username (password: cisco) but I havent created another user account. The cisco username is no longer valid as it has expired after one use. I need to reset my router back to default, so I can configure using SDM How do I do this?? Console into the router, then power cycle it. As its rebooting hit the "break | pause" button on your keyvboard, and you get to the rommon1> prompt.Then type rommon1>confreg 2142 rommon2>reset The router comes back on as if it were new---answer no to the first question...

cookie expire time and time zones
Hi I have asked this question in alt.php as the time() function as used in setcookie belongs to php - or does it belong equally in the javascript camp - bit confused about that. Anyway, can anyone here put me straight on the following: I had a look at the time() function came across this: "To clarify, it seems this function returns the time of the computer's clock and does not do any timezone adjustments to return GMT, so you are given the local time. The description says that it's supposed to return the number of seconds from 1970 12am GMT, when the seconds are actually counte...

key holding time / key release time
Hi all, We're looking for a way to determine when a certain key has been released (or in other words : what the holding time of that key was). We already know how to time when it is pressed, but not when it is released. Is it possible to do this in Matlab ? Thanks in advance, Davy and Julien "Davy Caelen" <Davy.Caelen@student.kuleuven.ac.be> wrote in message <eed9d54.-1@webx.raydaftYaTP>... > Hi all, > > We're looking for a way to determine when a certain key has been > released (or in other words : what the holding time of that key was). >...

User + sys times greater than elapsed time
Previously in these hallowed halls I have queried the values for user and sys cpu as reported by sysmaster. The documentation says that it reports minutes but I have proved that it is seconds. The today I hit another "strange effect". I have been trying to look into a performance problem so I have written a script which basically selects user and os times from the sysmaster database and stores them with the current time. I run this script at 10 minute intervals throughout the day. Imagine my surprise when I find that user time + sys time comes out to greater than elap...

wall time is less than user+sys time. why?
hi, I am attempting to profile my multi-threaded application by measuring the wall time (via gettimeofday())) and user+system time (via getrusage ()) on a Linux (2.6.18)/SLES10/x86-64 machine. something like this (pseudo code): ------------------- int main (void) { gettimeofday(&tstart, NULL); getrusage(RUSAGE_SELF, &rstart); do_task_involving_multiple_threads(); gettimeofday(&tend, NULL); getrusage(RUSAGE_SELF, &rend); // wall time print_time_diff(tstart, tend); // user time (time spent in userspace) print_time_diff(rstart.ru_utime, rend.ru_utime); /...

server time vs browser time on cookie expirations
Say, I want to set a cookie and have it expire an hour after it's set. It's looking like this is only possible for browsers which are in the same time zone as my server?? In other words, if I set my cookie with: setcookie('CookieName', $SomeValue, time()+3600, "/"); the cookie should expire 1 hr later. But time() returns the time as it is at the location of the server. If whoever loads my page is 3 timezones east of where my server is, the time that I set is already expired as far as that browser is concerned! Is this correct or am I completely nuts? If it is ...

time.time or time.clock
I'm having some cross platform issues with timing loops. It seems time.time is better for some computers/platforms and time.clock others, but it's not always clear which, so I came up with the following to try to determine which. import time # Determine if time.time is better than time.clock # The one with better resolution should be lower. if time.clock() - time.clock() < time.time() - time.time(): clock = time.clock else: clock = time.time Will this work most of the time, or is there something better? Ron On Jan 14, 7:05 am, Ron Ad...

time.clock() or time.time()
What's the difference between time.clock() and time.time() (and please don't say clock() is the CPU clock and time() is the actual time because that doesn't help me at all :) I'm trying to benchmark some function calls for Zope project and when I use t0=time.clock(); foo(); print time.clock()-t0 I get much smaller values than when I use time.clock() (most of them 0.0 but some 0.01) When I use time.time() I get values like 0.0133562088013, 0.00669002532959 etc. To me it looks like time.time() gives a better measure (at least from a statistical practical point of view). peterb...

am I doing this wrong: print (time.time() / 60) / 60 #time.time has been running for many hours if time.time() was (21600/60) then that would equal 360/60 which would be 6, but I'm not getting 6 so I'm not doing the division right, any tips? On Sat, 24 Jan 2004 13:01:40 -0500, Bart Nessux <bart_nessux@hotmail.com> wrote: >am I doing this wrong: > >print (time.time() / 60) / 60 #time.time has been running for many hours > >if time.time() was (21600/60) then that would equal 360/60 which would >be 6, but I'm not getting 6 so I'm not doing the divisi...

setup vs. clock-to-output time vs. hold time
Hello, I am new to VHDL and FPGA design. My question: I want to make a synchronous design. What is the condition for a synchronous design to work with regard to the setup and clock-to-output and hold time of the FFs? Does the setup time have to be smaller than the clock-to-output time? What about the hold time in respect to setup and clock-to-output? Thanks to you. Rgds Set up time is the amount of time before the clock edge that the input signal needs to be stable to guarantee it is accepted properly on the clock edge. Hold time is the amount of time after the clock edge that same i...

Web resources about - BGP notification hold time expired - comp.dcom.sys.cisco

Fire alarm notification appliance - Wikipedia, the free encyclopedia
A fire alarm notification appliance is an active fire protection component. A notification appliance may use audible, visible, or other stimuli ...

Facebook To Allow Users To Opt Out Of Notifications Directly Via Drop-Down Menu
Facebook continues to give its users more and easier controls over the notifications they receive, announcing Wednesday that it will implement ...

Microsoft Outlook updated with a new calendar Notification Center widget
... now take advantage of a new calendar widget that shows a quick glance of thedays activities. To view the widget, go to the bottom of your Notification ...

Contextual and Granular Notification Controls
I love getting notifications on my phone. I’ve written a lot about notifications, at one point calling the notifications screen “my home screen.” ...

Firefox 44 debuts push notifications
Mozilla today released Firefox 44, following in rival Chrome's footsteps by adding push notifications to the browser. Tuesday's update to version ...

Is iOS 9.3 Night Shift mode coming to Notification Center?
For our money, Night Shift is one of the coolest additions to iOS 9.3 Beta 1. In fact, it could be the most important UI/UX improvement iOS has ...

You Can Now Customize Swipe Actions in Yahoo Mail, Use Actionable Notifications
... are customizable, so it’s left to the user what you would like Yahoo Mail to do. In addition to swiping actions, newly expandable notifications ...

Firefox gives you push notifications from websites
If you've wanted websites to push notifications whenever there's a big update, you've typically had to use a browser like Chrome or Safari. As ...

Watching Real-Time Instagram Notifications Pour In After 8-Million Follower Account Posts Something
This is a short video of Dutch soccer player Demy de Zeeuw's Instagram notifications (he has 8 million followers) after he posts a new piece ...

GeekWire Deals: This watch combines classic looks with smart notifications
... smarts you really need. The Martian Notifier Smartwatch has easily readable analog hands and a small black-and-white screen to display notifications. ...

Resources last updated: 2/2/2016 9:04:58 PM