[j-nsp] EX/MX G.8032 with OAM CCM's

[Ben Boyd]

Here is config from one of the MX nodes:


oam {
        ethernet {
            connectivity-fault-management {
                action-profile rmep-defaults {
                    default-actions {
                        interface-down;
                    }
                }
                maintenance-domain d1 {
                    level 0;
                    maintenance-association control {
                        inactive: continuity-check {
                            interval 10ms;
                            loss-threshold 5;
                            hold-interval 1;
                        }
                        mep 2 {
                            interface xe-2/0/0;
                            remote-mep 1 {
                                action-profile rmep-defaults;
                            }
                        }
                    }
                }
                maintenance-domain d8 {
                    level 0;
                    maintenance-association control {
                        inactive: continuity-check {
                            interval 10ms;
                            loss-threshold 5;
                            hold-interval 1;
                        }
                        mep 1 {
                            interface xe-1/3/0.16;
                            remote-mep 2 {
                                action-profile rmep-defaults;
                            }
                        }
                    }
                }
            }
        }
    }


    protection-group {
        ethernet-ring sidera-ring-1 {
            east-interface {
                control-channel {
                    xe-1/3/0.10;
                }
            }
            west-interface {
                control-channel {
                    xe-2/0/0.10;
                }
            }
            data-channel {
                vlan 1-4094;
            }
        }
    }


Here is one of the configs from the EX nodes:
protection-group {
        ethernet-ring sidera-ring-1 {
            east-interface {
                control-channel {
                    xe-0/1/0.0;
                }
            }
            west-interface {
                control-channel {
                    xe-0/1/2.0;
                }
            }
            control-vlan MANAGEMENT;
            data-channel {
                vlan [ MANAGEMENT CUSTOMER_A CUSTOMER_B CUSTOMER_C CUSTOMER_D_TRUNK L2TUNNEL ];
            }
        }
    }

 oam {
        ethernet {
            connectivity-fault-management {
                action-profile rmep-defaults {
                    default-actions {
                        interface-down;
                    }
                }
                maintenance-domain d5 {
                    level 0;
                    maintenance-association control {
                        inactive: continuity-check {
                            interval 10ms;
                            loss-threshold 5;
                            hold-interval 1;
                        }
                        mep 2 {
                            interface xe-0/1/0.0 vlan-id 13;
                            remote-mep 1 {
                                action-profile rmep-defaults;
                            }
                        }
                    }
                }
                maintenance-domain d6 {
                    level 0;
                    maintenance-association control {
                        inactive: continuity-check {
                            interval 10ms;
                            loss-threshold 5;
                            hold-interval 1;
                        }
                        mep 1 {
                            interface xe-0/1/2.0 vlan-id 14;
                            remote-mep 2 {
                                action-profile rmep-defaults;
                            }
                        }
                    }
                }
            }
        }
    }



When OAM is activated, several of my interfaces in the ring start bouncing......

I'm wondering if the EX's just can't handle the 10ms interval.   Customer is looking for sub 50ms convergence times (competing with REP on Ciscos).

We skipped configuring it, but if we make it back, I'll set it up to 400ms x 3 and see if that changes anything..... but wouldn't RSTP just as fast in this case?

-----------------------------------
Ben Boyd
ben at sinatranetwork.com
http://about.me/benboyd




On Jun 2, 2012, at 6:27 PM, Ben Dale wrote:

> Having just done this in the last week (strictly EXs), I'd suggest that neither your OAM and G.8032 are configured correctly - post up some configuration if you can.
> 
> Make sure you have your link-fault-management action-profile is set to link-down and that you have an apply-action-profile bound to the interface as well.
> 
> My testing (very rough) showed about 0.5 seconds between link down and switch-over - I chalk this up to my test lab being copper interfaces and the slight lag in link-down detection.  
> 
> I think the minimum timers for OAM on the EX are 400ms x 3, which is nothing special, so unless you have intermediate Layer 1 devices to detect failure in, I don't think mixing OAM and G.8032 really buys you BFD-like performance. 
> 
> I'm hoping this will be improved in the future - I seem to recall Extreme's EAPS clocking in at a order of magnitude or two quicker.
> 
> Cheers,
> 
> Ben
> 
> On 01/06/2012, at 10:21 PM, Ben Boyd wrote:
> 
>> Experts, 
>> 
>> Does anyone out there have any working G.8032 ethernet ring w/ OAM backend configurations/implementations?
>> 
>> 
>> I setup an 8 switch (EX/MX mix) ring in the lab and OAM seems to be complicating things rather than acting like a layer 2 BFD. 
>> 
>> 
>> When I fail a node (not the ring owner) without OAM configured in just a plain G.8032 ring, the convergence time is around 30 seconds. (Seems a bit high.  I've seen better times with RSTP)
>> 
>> When I fail a node (not the ring owner) with OAM configured, 50-70% of the ring goes to discarding and fluctuates from there, never ultimately converging. 
>> 
>> Link failures on the other hand, converge in about 45ms.
>> 
>> 
>> 
>> If you need configs I can post them, but they're pretty vanilla (from the config examples on Juniper's site).
>> 
>> 
>> 
>> -----------------------------------
>> Ben Boyd
>> ben at sinatranetwork.com
>> http://about.me/benboyd
>> 
>> 
>> 
>> 
>> _______________________________________________
>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/juniper-nsp
>> 
>