[c-nsp] huge amount of mcast traffic
Pavel Skovajsa
pavel.skovajsa at gmail.com
Mon Oct 17 07:02:56 EDT 2016
James,
So all your customers are on 6708?
Why thing you can try is check the internal architecture of the 6708 cards
especially the egress replication asic.Probably also depends on which ports
you have the customers connected...
-pavel
Dňa 13.10.2016 18:44 používateľ "Matthew Huff" <mhuff at ox.com> napísal:
> A sustained 6Gps on a 10GB pipe is hard to do already, but with
> multicast…. Typically that large of multicast is broken up into different
> multicast addresses can be split on multiple lines. The burst nature of the
> feed is going to be an issue. Will it work, yes. Will it work well, I doubt
> it.
>
> ----
> Matthew Huff | 1 Manhattanville Rd
> Director of Operations | Purchase, NY 10577
> OTA Management LLC | Phone: 914-460-4039
> aim: matthewbhuff | Fax: 914-694-5669
>
> From: james list [mailto:jameslist72 at gmail.com]
> Sent: Thursday, October 13, 2016 12:34 PM
> To: Matthew Huff <mhuff at ox.com>
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] huge amount of mcast traffic
>
> well we'll connect to 10 Gbs interface a traffic up to 6 Gbs, not on 6748
> 1 Gbs blades... no other issue you see ?
>
> 2016-10-13 18:31 GMT+02:00 Matthew Huff <mhuff at ox.com<mailto:mhuff at ox.com
> >>:
> The 6748 blades are going to be an issue with buffer overruns. Whether
> this will be a minor or major issue depends on the application that uses
> the multicast data.
>
> ----
> Matthew Huff | 1 Manhattanville Rd
> Director of Operations | Purchase, NY 10577
> OTA Management LLC | Phone: 914-460-4039<tel:914-460-4039>
> aim: matthewbhuff | Fax: 914-694-5669<tel:914-694-5669>
>
> From: james list [mailto:jameslist72 at gmail.com<mailto:
> jameslist72 at gmail.com>]
> Sent: Thursday, October 13, 2016 12:25 PM
> To: Matthew Huff <mhuff at ox.com<mailto:mhuff at ox.com>>
> Cc: cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>
> Subject: Re: [c-nsp] huge amount of mcast traffic
>
>
> Hi
>
>
>
> I’m not able to find the multicast replication mode on ASR..
>
>
>
> On core routers:
>
>
>
> C6807 has Supervisor Engine 2T 10GE and IOS 15.1(2)SY4
>
>
>
> xxx>sh module
> Mod Ports Card Type Model Serial
> No.
> --- ----- -------------------------------------- ------------------
> -----------
> 1 20 DCEF2T 4 port 40GE / 16 port 10GE WS-X6904-40G xx
> 2 20 DCEF2T 4 port 40GE / 16 port 10GE WS-X6904-40G xx
> 3 5 Supervisor Engine 2T 10GE w/ CTS (Acti VS-SUP2T-10G xx
> 5 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6848-GE-TX xx
>
>
>
> Mod Sub-Module Model Serial Hw
> Status
>
>
>
> ---- --------------------------- ------------------ ----------- -------
> -------
>
>
>
> 1 Distributed Forwarding Card WS-F6K-DFC4-E xxx 1.2 Ok
>
>
>
> 2 Distributed Forwarding Card WS-F6K-DFC4-E xxx 1.2 Ok
>
>
>
> 3 Policy Feature Card 4 VS-F6K-PFC4 xxx 3.0 Ok
>
>
>
> 3 CPU Daughterboard VS-F6K-MSFC5 xxx 3.0 Ok
>
>
>
> 5 Distributed Forwarding Card WS-F6K-DFC4-A xxx 1.4 Ok
>
>
>
> xxx#sh platform multicast routing replication
>
>
>
> Current mode of replication is Egress
>
>
>
> Configured mode of replication is Egress
>
>
>
>
>
> Switch Slot Multicast replication capability
>
>
>
> 1 1 Egress
>
>
>
> 1 2 Egress
>
>
>
> 1 3 Egress
>
>
>
> 1 5 Egress
>
>
>
> 2 1 Egress
>
>
>
> 2 2 Egress
>
>
>
> 2 3 Egress
>
>
>
> 2 5 Egress
>
>
>
> 4 1 Ingress
>
>
>
> 3 1 Ingress
>
>
>
> 5 1 Ingress
>
>
>
>
>
> C6500 has Supervisor Engine 720 10GE and IOS 12.2(33)SXI5
>
>
>
>
>
> xxx>sh module
>
>
>
> Mod Ports Card Type Model Serial
> No.
>
>
>
> --- ----- -------------------------------------- ------------------
> -----------
>
>
>
> 1 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX xxx
>
>
>
> 2 8 CEF720 8 port 10GE with DFC WS-X6708-10GE xxx
>
>
>
> 3 48 CEF720 48 port 10/100/1000mb Ethernet WS-X6748-GE-TX xxx
>
>
>
> 4 48 CEF720 48 port 1000mb SFP WS-X6748-SFP xxx
>
>
>
> 5 5 Supervisor Engine 720 10GE (Active) VS-S720-10G xxx
>
>
>
>
>
> Mod Sub-Module Model Serial Hw
> Status
>
>
>
> ---- --------------------------- ------------------ ----------- -------
> -------
>
>
>
> 1 Distributed Forwarding Card WS-F6700-DFC3C xxx 1.6 Ok
>
>
>
> 2 Distributed Forwarding Card WS-F6700-DFC3C xxx 1.8 Ok
>
>
>
> 3 Distributed Forwarding Card WS-F6700-DFC3C xxx 1.6 Ok
>
>
>
> 4 Centralized Forwarding Card WS-F6700-CFC xxx 4.2 Ok
>
>
>
> 5 Policy Feature Card 3 VS-F6K-PFC3C xxx 1.1 Ok
>
>
>
> 5 MSFC3 Daughterboard VS-F6K-MSFC3 xxx 1.0 Ok
>
>
>
>
>
> xxx>show mls ip multicast capability
>
>
>
> Current mode of replication is Egress
>
>
>
> Configured replication mode is Auto
>
>
>
>
>
> Slot Multicast replication capability
>
>
>
> 1 Egress
>
>
>
> 2 Egress
>
>
>
> 3 Egress
>
>
>
> 4 Egress
>
>
>
> 5 Egress
>
>
>
> Cheers
>
> 2016-10-13 17:59 GMT+02:00 Matthew Huff <mhuff at ox.com<mailto:mhuff at ox.com
> >>:
> Even with fabric enable blades in the c6500, you are going to get massive
> output buffer overflows. Market data has very uneven traffic patterns
> causing microburst effects. What sup-engines/blades are on the boxes? What
> type of multicast replication is being used (ingress/egress). QoS policies
> typically make matters worse. What type of interfaces are on the 6500?
>
>
> ----
> Matthew Huff | 1 Manhattanville Rd
> Director of Operations | Purchase, NY 10577
> OTA Management LLC | Phone: 914-460-4039<tel:914-460-4039>
> aim: matthewbhuff | Fax: 914-694-5669<tel:914-694-5669>
>
> > -----Original Message-----
> > From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net<mailto:cisco-
> nsp-bounces at puck.nether.net>] On Behalf Of
> > james list
> > Sent: Thursday, October 13, 2016 10:45 AM
> > To: cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>
> > Subject: [c-nsp] huge amount of mcast traffic
> >
> > Dear experts,
> >
> > I’ve a multicast financial market connected to my infrastructure, I’ve
> > been
> > informed that a new data multicast flow could reach up to 6 Gbs, so an
> > huge
> > amount of traffic needs to be replicated.
> >
> > Market is connected to an ASR 1001, than to a C6807-XL and customers
> > are
> > connected to C6500.
> >
> > ASR1001 is running 15.3(3)S1 and currently has a license for 2.5Gbs (to
> > be
> > upgrade)
> >
> > C6807 has Supervisor Engine 2T 10GE and IOS 15.1(2)SY4
> >
> > C6500 has Supervisor Engine 720 10GE and IOS 12.2(33)SXI5
> >
> > I’d like to understand in your experience if the mentioned
> > infrastructure
> > could suffer in performance or throughput or other, having to replicate
> > the
> > mentioned amount of traffic.
> >
> > Thanks in advance for any feedback
> >
> > Cheers
> >
> > James
> > _______________________________________________
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>
>
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