[c-nsp] me3600 me3800 EFP limits

[b.turnbow at twt.it]

Thanks Waris,
 
Got it I was mistakenly applying the overall xconnect limit to the EFPs.
 
Best Regards
 
Brian
 
From: Waris Sagheer (waris) [mailto:waris at cisco.com] 
Sent: venerdì 29 agosto 2014 09:02
To: b.turnbow at twt.it; cisco-nsp at puck.nether.net
Cc: Ramji Vasudevan (ramji)
Subject: Re: [c-nsp] me3600 me3800 EFP limits
 
Brian,
ME3800X has higher scale that's why the scale numbers are different from ME3600X. ME3800X is positioned for Pre-Agg hence higher scale.
ME36800X/ME3600X supports multi dimensional scale so number of Xconnect should not be impacted by the number of EFPs. EFP Maximum number is 4K however the number may go down depending on the TCAM usage due to different options. PW should not have this issue.
 
Best Regards,
 

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Waris Sagheer
Technical Marketing Manager
Service Provider Access Group (SPAG)
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From: "b.turnbow at twt.it" <b.turnbow at twt.it>
Date: Thursday, August 28, 2014 at 9:39 AM
To: "cisco-nsp at puck.nether.net" <cisco-nsp at puck.nether.net>
Subject: [c-nsp] me3600 me3800 EFP limits
 
Hello Everyone,
 
I am trying to get clarification  on the max number of EFPs on the me3600/3800s and am having some difficulty...
The config guide has changed over the various releases adding more info until we arrive at 15.4 guide like this one.
http://www.cisco.com/c/en/us/td/docs/switches/metro/me3600x_3800x/software/release/15-4_2_S/configuration/guide/3800x3600xscg/swevc.html
 
It states 
The number of EFP scales on ME3600x and ME3800x depends on the number of TCAM-MAPD entries. The maximum TCAM-MAPD entry is 4096. The number of TCAM-MAPD entries for an EFP configuration varies between 01-22 based on the VLAN configuration in the EFP encapsulation.
Following are the possible combinations of encapsulation in a VLAN configuration.
- When the encapsulation is a single VLAN, or has a list of VLANs, then encapsulation VLAN contains one TCAM-MAPD entry for each VLAN in the list.
- When the encapsulation has both dot1q and second dot1q VLANs, then the number of TCAM-MAPD entry contains multiples of TCAM-MAPD entries of dot1q and second dot1q.
- When the encapsulation VLAN has VLAN range, then the TCAM-MAPD entry is calculated based on the first and last values in the range.
 
Ok, so how I read this is that the me3600 and 3800 each have max 4096 TCAM-MAPD entries and they get used differently depending on how you configure the encapsulation. ( there is an example in the guide for those interested)
 
But then I see
 
On ME 3600X you can configure the following number of EFPs and cross connects per port:
- 4000 service instances per port
- 512 EFP xconnects per port
- 512 overall on device
On ME 3800X you can configure the following number of EFPs and cross connects per port:
- 4000 service instances per port
- 4000 EFP xconnects per port
- 8000 overall on device
 
Ok so the 512 on the me3600 would match the example in the guide as a limit , but it seems that the 3800 has a tcam-mapd limit over 4096 as you can have 8000 overall on the device.
Is the limit related to the tcam ? or to max values? Both?
I've looked all over for something that helps clarify this to no avail....
 
 
Can anyone help or point me to some documentation?
 
 
Thanks
 
Brian
 
 
 
 
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