> Just be careful with withdraws and re-announcements frequently. You may > trigger your upstream's flap protection, damping, etc. Every carrier we peer > with does it. AT&T is the most aggressive at policing advertisements based > on my past experience a couple years ago, and I highly doubt they've toned > it down any. Had a power issue at a site and our router rebooted a couple > times in 5 minutes. They wouldn't take our advertisement anymore. Took seven > freakin hours to get an engineer to clear it. So, try not to shoot yourself > in the foot.
So if you update your Mikrotik ROS at 3 am then after reboot you update the Mikrotik firmware and reboot again you are banned? Does this apply if you are doing a private ASN to them? We were thinking of making the move to them since its quite a bit cheaper then our current PTP circuits. > simple.... > > Adding routes and removing routes is a defined bgp function, and it is > considered to be one of a softer impact... > > killing a bgp session is disruptive, unexpected, depending on timeouts, it > can take as long a 3min to determine if the peer is gone, and then another > few min for the routes to fully propagate across the internet.. meanwhile > traffic is still heading your way... > > Regards > > Faisal Imtiaz > Snappy Internet & Telecom > 7266 SW 48 Street > Miami, FL 33155 > Tel: 305 663 5518 x 232 > > Help-desk: (305)663-5518 Option 2 or Email: [email protected] > > ________________________________ > > From: "Josh Luthman" <[email protected]> > To: [email protected] > Sent: Friday, September 9, 2016 10:01:24 AM > Subject: Re: [AFMUG] Bgp automatic drop session? > > Oh well that's easy enough. Why is that better than disabling the peer? > > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > On Fri, Sep 9, 2016 at 9:58 AM, Faisal Imtiaz <[email protected]> > wrote: >> >> This goes back to best practices... >> you should be using a filter to advertise the routes... >> >> e.g. our hiq-out filter ..... >> 0 chain=hiq-out match-chain=SDF-11280 invert-match=no action=accept >> set-bgp-prepend=2 set-bgp-prepend-path="" >> 1 X chain=hiq-out match-chain=SDG-10302 bgp-communities=11280:115 >> invert-match=no action=accept set-bgp-prepend=3 set-bgp-prepend-path="" >> 2 chain=hiq-out match-chain=TNN-46215 bgp-communities=11280:115 >> invert-match=no action=accept set-bgp-prepend-path="" >> 3 chain=hiq-out bgp-communities=11280:245 invert-match=no action=accept >> set-bgp-prepend-path="" >> 4 X chain=hiq-out bgp-communities=11280:135 invert-match=no action=accept >> set-bgp-prepend-path="" >> 5 chain=hiq-out bgp-communities=11280:666 invert-match=no action=accept >> set-bgp-prepend-path="" >> 6 X chain=hiq-out bgp-as-path=^29846_* bgp-communities=11280:235 >> invert-match=no action=accept set-bgp-prepend-path="" >> 7 chain=hiq-out invert-match=no action=discard set-bgp-prepend-path="" >> >> As you can see a couple of chain's are disabled (X)..... that will >> withdraw the prefixes as defined in referenced chains. >> >> >> Regards. >> >> Faisal Imtiaz >> Snappy Internet & Telecom >> 7266 SW 48 Street >> Miami, FL 33155 >> Tel: 305 663 5518 x 232 >> >> Help-desk: (305)663-5518 Option 2 or Email: [email protected] >> >> ________________________________ >> >> From: "Josh Luthman" <[email protected]> >> To: [email protected] >> Sent: Friday, September 9, 2016 9:50:20 AM >> Subject: Re: [AFMUG] Bgp automatic drop session? >> >> How would you "withdraw routes" on a Mikrotik? >> >> >> Josh Luthman >> Office: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> On Fri, Sep 9, 2016 at 9:47 AM, Faisal Imtiaz <[email protected]> >> wrote: >>> >>> Tut tut Tut ...... >>> >>> let's not start with bad habits... >>> >>> Best practices would be to withdraw the routes, and not kill the bgp >>> session... >>> >>> >>> :) >>> >>> Faisal Imtiaz >>> Snappy Internet & Telecom >>> 7266 SW 48 Street >>> Miami, FL 33155 >>> Tel: 305 663 5518 x 232 >>> >>> Help-desk: (305)663-5518 Option 2 or Email: [email protected] >>> >>> ________________________________ >>> >>> From: "TJ Trout" <[email protected]> >>> To: [email protected] >>> Sent: Friday, September 9, 2016 1:31:10 AM >>> Subject: [AFMUG] Bgp automatic drop session? >>> >>> Does anyone run any type of script that will automatically drop a bgp >>> session when a upstream is having problems but isn't hard down ? Like packet >>> loss, high latency or low throughout? >>> >>> I'm assuming it's nearly impossible without human intervention?? >>> >>> >> > >
