If the MICE’s technical page documented limiting unknown unicast to 100 Mbps, shouldn’t its gear be set up that way?
Frank
From: MICE Discuss <[log in to unmask]> On Behalf Of Jeremy Lumby
Sent: Friday, April 16, 2021 7:52 AM
To: [log in to unmask]
Subject: Re: [MICE-DISCUSS] Zayo Belle Plaine - April 15th
Right now it is setup for broadcast, and multicast, however I am in favor of adding unknown unicast.
From: MICE Discuss [mailto:[log in to unmask]] On Behalf Of Andrew Hoyos
Sent: Friday, April 16, 2021 12:38 AM
To: [log in to unmask]
Subject: Re: [MICE-DISCUSS] Zayo Belle Plaine - April 15th
Is there anything configured on the MICE core switches to police/drop unknown unicast?
I saw mention on the MICE technical page of 100mbps limit of unknown unicast, seems like maybe that could be more aggressive (or at a minimum, on route server ports and/or interfaces facing the Juniper?)
On Apr 15, 2021, at 10:52 PM, Jeremy Lumby <[log in to unmask]> wrote:
Frank,
Ideally it should not have, however what tends to happen is that when large ports go down the MAC addresses leave the table, and therefore the traffic gets flooded to all ports until BGP times out on the networks sending the traffic. Since the route servers only have 1G ports, the 10G of traffic that typically is flowing to Belle Plaine probably saturated the route server ports for a short amount of time. If you have short timeouts, or use something more sensitive like BFD I could see how your sessions dropped from the saturation.
Jeremy
From: MICE Discuss [mailto:[log in to unmask]] On Behalf Of Frank Bulk
Sent: Thursday, April 15, 2021 9:40 PM
To: [log in to unmask]
Subject: Re: [MICE-DISCUSS] Zayo Belle Plaine - April 15th
We (AS18883) saw our BGP sessions with the MICE router reflectors bounce at that time – should that have happened?
Frank
From: MICE Discuss <[log in to unmask]> On Behalf Of [log in to unmask]
Sent: Thursday, April 15, 2021 6:05 PM
To: [log in to unmask]
Subject: [MICE-DISCUSS] Zayo Belle Plaine - April 15th
Looks like the Zayo Belle Plaine remote went down at 5:37pm, I believe Lee @ SW MN Broadband is opening a ticket now.
From the MICE side we have light but no frames, and looking at other unrelated systems it appears the cut is South of Hwy 212 someplace.
Best of luck everyone,
Anthony
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