SLPP-GUARD over MLT

[EF]

Hi Team,

Over this topology:

SLPP in COREs and SLPP-GUARd in edge ports on ERS-STACK1, but what about MLT ports (x,y)? Could I apply SLPP-GUARD over MLT? Is there any other option to detect loops in the MLT between stacks?

Thanks in advance.

EF1

[Ludovico_Steven · Accepted solution]

Yes, you can do that.

ERS4900-STK(config)#% mlt
               alias% show mlt !!NONE\s -s
                                                                         LACP
Id  Name             Members                Bpdu   Mode  Status   Type   Key
--- ---------------- ---------------------- ------ ----- -------- ------ ----
1   Trunk #1         1/49,3/49              All    A     Enabled  Trunk  NONE
2   Trunk #2         1/1-2                  All    B     Enabled  Trunk  NONE
MODE Legend:
B=Basic, A=Advance, E=Enhanced, Man=ManLag, Dyn=DynLag
ERS4900-STK(config)#%
ERS4900-STK(config)#% ife 1/1-2
               alias% interface fastEthernet 1/1-2
ERS4900-STK(config-if)#% slpp-guard ?
  enable   Enable SLPP-guard on ports
  port     Port number(s) on which to change SLPP-guard settings
  timeout  Set SLPP-guard auto port re-enable timeout
ERS4900-STK(config-if)#% slpp-guard enable
ERS4900-STK(config-if)#%

[TQU]

HI EF1, 

Yes you can apply SLPP-Guard on port, to send slpp packet to the Stack-2 and use slpp-guard on. 

About a loop in MLT, what can generate it ? misconfiguration or config loss on stack-2 ? 

About config loss, you should use LACP. If stack-2 have config trouble, link x or y or both will stay out of the mlt. 

If you have any other use case of loop in the MLT, let me know. 

regards, 

TQU