[j-nsp] L2circuit martini issue....!

Wed Jan 24 03:53:18 EST 2007

Fahad,

If your Ethernet switch do not support any keep-a-live mechanism (e.g. 
eth OAM 802.3ah) there is no way to detect that VLAN is down, when whole 
port is up. So, I do not see possiblility to detect problem with CE -PE 
logical link. There is just nmo such information available. And, BTW, 
this is a reason for develop Eth OAM by IEEE.
Of course CE possibly can run L3 protocol toward other CE (e.g. BFD), 
but then only CEs will know about e2e status. Not PE.

FAHAD ALI KHAN napisał(a):
> Thanx Alex....!
>
> FREEK works....but there comes another issue like that....as we transport
> VLAN-TCC and VLAN-CCC clients. If there lastmile goes down.....VLAN BPDUs
> will still recieve over Turnk port (Switch to Juniper). So it coz L2Circuit
> to remain up.
>
> I look for the Ethernet/VLAN OAM that defines in 802.3ah. but its
> implementation is not possible on all layer 2 Switches.
> Also work on these standards are still in process.
>
> can u ppl tell me, Is there any other thing that can help me to detect the
> end to end failure for Layer 2 VPNs (CCC or TCC) like FREEK do for FR. Im
> looking for OAM or BFD....features.....does they can solve the issue.....!
>
> Regards
>
> Fahad Ali Khan
>
>
> On 1/15/07, Alex <alex.arseniev at gmail.com> wrote:
>   
>> If Your Client routers support it, FREEK (acronym for Frame-Relay
>> End-to-End
>> Keepalive) may be what You are looking for...
>> Cheers
>> Alex
>>
>> ----- Original Message -----
>> From: "FAHAD ALI KHAN" <fahad.alikhan at gmail.com>
>> To: "juniper-nsp" <juniper-nsp at puck.nether.net>
>> Sent: Monday, January 15, 2007 9:48 AM
>> Subject: [j-nsp] L2circuit martini issue....!
>>
>>
>> Guys....!
>>
>> I have got stuck in a issue regarding MPLS L2circuit (Martini). Here is my
>> scenario,
>>
>>
>> L2cct (Martini) has been configured between two MPLS Nodes. Client Site A
>> is
>> connected directly over E1 at MPLS Node (M10i) and Client Site B is
>> connected to Frame Relay Switch (New Bridge 3600) over E1 where its DLCI
>> sync. It then extended to second MPLS Node over FR-NNI (E1). Refer to
>> below
>> mention diagram,
>>
>>                                                        __
>> ____________________
>>
>>                                                        |    ( L2circuit
>> Martini)       |
>>
>> CE – FR Switch – (FR-NNI over E1) – M10i ------------------------- M10i –
>> CE
>>
>>
>>
>> Client is UP and running successfully.
>>
>>
>>
>> **
>>
>> *MPLS Node - B*
>>
>>
>>
>> *show interfaces ds-1/1/2:1.0 *
>>
>> Logical interface ds-1/1/2:1.0 (Index 121) (SNMP ifIndex 156)
>>
>>    Description: *** Client X SITE B ***
>>
>>    Flags: Point-To-Point SNMP-Traps Encapsulation: FR-CCC
>>
>> Input packets : 47743200
>>
>> Output packets: 43623195
>>
>>    Protocol ccc, MTU: 1504
>>
>>      Flags: None
>>
>>    *DLCI 152*
>>
>>     * Flags: Active, DCE-Configured*
>>
>>      Total down time: 53:49:06 sec, Last down: 01:34:06 ago
>>
>>      Input packets : 47743200
>>
>>      Output packets: 43623195
>>
>>
>>
>> *show l2circuit connections*
>>
>> Neighbor: A.B.C.D
>>
>> *Interface                 Type  St     Time last up          # Up trans*
>>
>> *ds-1/1/2:1.0{vc 152)      rmt   Up     Dec 26 08:32:09 2006           1*
>>
>> *Local interface: ds-1/1/2:1.0, Status: Up* , Encapsulation: FRAME RELAY
>>
>> Remote PE: W.X.Y.Z, Negotiated control-word: Yes (Null)
>>
>> Incoming label: 102320, Outgoing label: 155888
>>
>>
>>
>> *MPLS Node - A*
>>
>>
>>
>> show interfaces e1-1/1/9.0
>>
>> Logical interface e1-1/1/9.0 (Index 121) (SNMP ifIndex 152)
>>
>>    Description: *** Client X SITE A ***
>>
>>    Flags: Point-To-Point SNMP-Traps Encapsulation: FR-CCC
>>
>> Input packets : 477432
>>
>> Output packets: 43623
>>
>>    Protocol ccc, MTU: 1504
>>
>>      Flags: None
>>
>>    *DLCI 152*
>>
>>     * Flags: Active, DCE-Configured*
>>
>>      Total down time: 53:49:06 sec, Last down: 01:34:06 ago
>>
>>      Input packets : 477432
>>
>>      Output packets: 43623
>>
>>
>>
>> *show l2circuit connections*
>>
>> Neighbor: W.X.Y.Z
>>
>> *Interface                 Type  St     Time last up          # Up trans*
>>
>> *e1-1/1/9.0{vc 152)      rmt    Up     Dec 26 08:32:09 2006           1*
>>
>> *Local interface: e1-1/1/9.0, Status: Up, *Encapsulation: FRAME RELAY
>>
>> Remote PE: A.B.C.D, Negotiated control-word: Yes (Null)
>>
>> Incoming label: 102320, Outgoing label: 155888
>>
>>
>>
>> *Problem:*
>>
>>
>>
>> When Client SITE B goes down (due to lastmile failure), FR Node make the
>> DLCI inactive and signals to M10i to force the DLCI down. But at M10i only
>> DLCI goes down not CCC which causes l2circuit to remain UP and SITE A get
>> the L2circuit UP, if its other SITE is down. If client have a backup link
>> between these sites than Site A router will not trigger for backup link.
>>
>>
>>
>> *MPLS Node - B*
>>
>>
>>
>> *show interfaces ds-1/1/2:1.0 *
>>
>> Logical interface ds-1/1/2:1.0 (Index 121) (SNMP ifIndex 156)
>>
>>    Description: *** Client X SITE B ***
>>
>>    Flags: Point-To-Point SNMP-Traps Encapsulation: FR-CCC
>>
>> Input packets : 47743200
>>
>> Output packets: 43623195
>>
>>    Protocol ccc, MTU: 1504
>>
>>      Flags: None
>>
>> *    DLCI 152*
>>
>> *      Flags: Down, DCE-Configured*
>>
>>      Total down time: 53:49:06 sec, Last down: 01:34:06 ago
>>
>>      Input packets : 47743200
>>
>>      Output packets: 43623195
>>
>> **
>>
>> * *
>>
>> **
>>
>> *show l2circuit connections*
>>
>> Neighbor: A.B.C.D
>>
>> *Interface                 Type  St     Time last up          # Up trans*
>>
>> *ds-1/1/2:1.0{vc 152)      rmt   Up     Dec 26 08:32:09 2006           1*
>>
>> *Local interface: ds-1/1/2:1.0, Status: Up* , Encapsulation: FRAME RELAY
>>
>> Remote PE: W.X.Y.Z, Negotiated control-word: Yes (Null)
>>
>> Incoming label: 102320, Outgoing label: 155888
>>
>>
>>
>> *MPLS Node - A*
>>
>>
>>
>> *show interfaces e1-1/1/9.0*
>>
>> Logical interface e1-1/1/9.0 (Index 121) (SNMP ifIndex 152)
>>
>>    Description: *** Client X SITE A ***
>>
>>    Flags: Point-To-Point SNMP-Traps Encapsulation: FR-CCC
>>
>> Input packets : 477432
>>
>> Output packets: 43623
>>
>>    Protocol ccc, MTU: 1504
>>
>>      Flags: None
>>
>>    *DLCI 152*
>>
>>     * Flags: Active, DCE-Configured*
>>
>>      Total down time: 53:49:06 sec, Last down: 01:34:06 ago
>>
>>      Input packets : 477432
>>
>>      Output packets: 43623
>>
>>
>>
>> *show l2circuit connections*
>>
>> Neighbor: W.X.Y.Z
>>
>> *Interface                 Type  St     Time last up          # Up trans*
>>
>> *e1-1/1/9.0{vc 152)      rmt    Up     Dec 26 08:32:09 2006           1*
>>
>> *Local interface: e1-1/1/9.0, Status: Up* , Encapsulation: FRAME RELAY
>>
>> Remote PE: A.B.C.D, Negotiated control-word: Yes (Null)
>>
>> Incoming label: 102320, Outgoing label: 155888
>>
>>
>>
>> My Question:
>>
>> *Why L2circuit is not down, if FR node signal to down the DLCI? This
>> signal
>> not causes CCC to down. or Is there any way to reflect DLCI down to far
>> end
>> CE? *
>> _______________________________________________
>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/juniper-nsp
>>
>>
>>     
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