[j-nsp] Question about 100 Gbps MPC4E

[Olivier Benghozi]

Hi all,

But if you read the documentation again, you see that vlan-steering and sa-multicast are only workarounds to balance traffic going through old 100-Gigabit Ethernet type 4 PIC model number PD-1CE-CFP-FPC4 (T-series interface), which was designed with two 50Gb/s PFE, unlike more modern PICs (type 5 on T-series) and, more important, unlike MX MPC3E and its MICs.

Sa-multicast is a trick usable on Juniper gears toward an FPC4 to use ethernet MACs tricks (setting source MAC multicast bit to 1 on about half the flows), so the FPC4 can balance received frames between its two PFE.
Vlan-steering is a trick usable on an FPC4 to balance vlan IDs between its two PFE, if the facing router doesn't support sa-multicast trick/workaround/patch-up.



So, basically, on MX with MPC3E facing ASR (or MX/MPC facing MX/MPC): there's nothing special to do in this case, since it's completely unrelated.



Olivier


> Le 30 janv. 2015 à 15:17, David Lockuan <dlockuan at gmail.com> a écrit :
> 
> Hi Giuliano,
> 
> If you read the documentation, the option of SA-Multicast is to
> interoperability between MPC4E and PIC 100G FPC4 (Juniper Devices). And it
> is because the PIC 100G for FPC4 have 2 PFE of 50Gbps.
> 
> If you have gone to connect MX and ASR to 100G, you need to use
> "vlan-steering" configuration, this to interoperability between different
> vendors.
> 
> Br,
> 
> ---
> David
> 
> 
> On Fri, Jan 30, 2015 at 4:16 AM, Damian Holdcroft <
> damian.holdcroft at gmail.com> wrote:
> 
>> I believe that configuration option is only required when connecting to
>> 100GE cards in type-4 FPCs in T-series. You shouldn't need it to connect to
>> an ASR9K.
>> 
>> Cheers,
>> Damian