Ethernet Switching
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Ethernet Switching

Traffic not pass through l2circuit while it is showing UP - EX4550

a week ago

Hi all,

I'm facing an issue with traffic through l2circuit, no traffic is going on that circuit while is showing UP others l2circuit is working (pass traffic).

I have a bockbone with 13 juniper EX4550 running all 12.3R12-S7, ldp and rsvp all enable on mpls interfaces.

between EX4550 cg-sw1 and cg-sw1 a circuit is configure as below

 

cg-sw1#
set  interfaces xe-0/0/10 description "L2L Customer A"
set  interfaces xe-0/0/10 mtu 9216
set  interfaces xe-0/0/10 encapsulation ethernet-ccc
set  interfaces xe-0/0/10 unit 0 family ccc
set  protocols l2circuit neighbor 192.168.200.6 interface xe-0/0/10.0 virtual-circuit-id 2006

 

cg-sw6#
set interfaces xe-0/0/2 description "L2L Customer A"
set interfaces xe-0/0/2 mtu 9216
set interfaces xe-0/0/2 encapsulation ethernet-ccc
set interfaces xe-0/0/2 unit 0 family ccc
set protocols l2circuit neighbor 192.168.200.1 interface xe-0/0/2.0 virtual-circuit-id 2006

 

The circuit is UP has below but not traffic is passed:

cg-sw1> show l2circuit connections neighbor 192.168.200.6 interface xe-0/0/10.0
Layer-2 Circuit Connections:

Legend for connection status (St)   
EI -- encapsulation invalid      NP -- interface h/w not present   
MM -- mtu mismatch               Dn -- down                       
EM -- encapsulation mismatch     VC-Dn -- Virtual circuit Down    
CM -- control-word mismatch      Up -- operational                
VM -- vlan id mismatch         CF -- Call admission control failure
OL -- no outgoing label          IB -- TDM incompatible bitrate
NC -- intf encaps not CCC/TCC    TM -- TDM misconfiguration
BK -- Backup Connection          ST -- Standby Connection
CB -- rcvd cell-bundle size bad  SP -- Static Pseudowire
LD -- local site signaled down   RS -- remote site standby
RD -- remote site signaled down  XX -- unknown

Legend for interface status  
Up -- operational            
Dn -- down                   
Neighbor: 192.168.200.6
    Interface                 Type  St     Time last up          # Up trans
    xe-0/0/10.0(vc 2006)      rmt   Up     Jan  7 18:40:49 2019           1
      Remote PE: 192.168.200.6, Negotiated control-word: Yes (Null)
      Incoming label: 308432, Outgoing label: 306320
      Negotiated PW status TLV: No
      Local interface: xe-0/0/10.0, Status: Up, Encapsulation: ETHERNET

{master:0}
cg-sw1>

What is very strange to me is, if I disable and enable port, traffic start going trough but, an other l2circuit stop forwarding traffic at the same time on the equipement traffic while is showing UP and all others continue to work.

 

I have done traceoptions under [protocols l2circuit] no trace collect as all l2circuit is showing UP, note that on juniper EX4550 I can't perform ping mpls (not support), do some one faced already this issue ? do you have an idea, who to troubleshoot well and solve this issue ?

I was thinking may be the issue is the PFE (Packet Forwarding Engine), I checked "show pfe route ip/mpls" all labels are exchange well.

Any suggestion will be wellcome.

Thank you.

 

2 REPLIES
Ethernet Switching

Re: Traffic not pass through l2circuit while it is showing UP - EX4550

[ Edited ]
a week ago

Hello there,

There is not enough information to analyze. Please let us know:

1/ is there any other L2circuit BETWEEN THE SAME PAIR OF SWITCHES that passes traffic? If yes please post its config. If not, then please read https://www.juniper.net/documentation/en_US/junos/topics/concept/mpls-ex-series-components.html and make sure that core-facing interfaces on CG-SW1 AND CG-SW6 are untagged.

2/ have You tried disabling Control Word?

HTH

Thx

Alex

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Ethernet Switching

Re: Traffic not pass through l2circuit while it is showing UP - EX4550

a week ago

Hello

Thank you for your reply.

For your first point:

Yes, there is others l2circuit BETWEEN THE SAME PAIR OF SWITCHES that passes traffic

Core facing interfaces are untagged

Find below how my config is organized.

 

For your second point, I did not yet disable Control Word, I'm still checking why this come, if any progress I will schedule a maintenance window in order to disable Control Word.

 

Any suggestions will be wellcome.

 

cg-sw1#
set groups SERVICE-CUSTOMER-A interfaces xe-0/0/10 description "L2L Customer A"
set groups SERVICE-CUSTOMER-A interfaces xe-0/0/10 mtu 9216
set groups SERVICE-CUSTOMER-A interfaces xe-0/0/10 encapsulation ethernet-ccc
set groups SERVICE-CUSTOMER-A interfaces xe-0/0/10 unit 0 family ccc
set groups SERVICE-CUSTOMER-A protocols l2circuit neighbor 192.168.200.6 interface xe-0/0/10.0 virtual-circuit-id 2006
set apply-groups SERVICE-CUSTOMER-A

set groups SERVICE-CUSTOMER-B interfaces ge-0/0/3 unit 3300 description "L2L Customer B"
set groups SERVICE-CUSTOMER-B interfaces ge-0/0/3 unit 3300 encapsulation vlan-ccc
set groups SERVICE-CUSTOMER-B interfaces ge-0/0/3 unit 3300 vlan-id 3300
set groups SERVICE-CUSTOMER-B interfaces ge-0/0/3 unit 3300 family ccc
set groups SERVICE-CUSTOMER-B protocols l2circuit neighbor 192.168.200.6 interface ge-0/0/3.3300 virtual-circuit-id 3300
set apply-groups SERVICE-CUSTOMER-B

set groups SERVICE-CUSTOMER-C interfaces ge-0/0/6 unit 947 description "L2L Customer C"
set groups SERVICE-CUSTOMER-C interfaces ge-0/0/6 unit 947 encapsulation vlan-ccc
set groups SERVICE-CUSTOMER-C interfaces ge-0/0/6 unit 947 vlan-id 947
set groups SERVICE-CUSTOMER-C interfaces ge-0/0/6 unit 947 family ccc
set groups SERVICE-CUSTOMER-C protocols l2circuit neighbor 192.168.200.6 interface ge-0/0/6.947 virtual-circuit-id 2011
set apply-groups SERVICE-CUSTOMER-C



cg-sw6#
set groups SERVICE-CUSTOMER-A interfaces xe-0/0/2 description "L2L Customer A"
set groups SERVICE-CUSTOMER-A interfaces xe-0/0/2 mtu 9216
set groups SERVICE-CUSTOMER-A interfaces xe-0/0/2 encapsulation ethernet-ccc
set groups SERVICE-CUSTOMER-A interfaces xe-0/0/2 unit 0 family ccc
set groups SERVICE-CUSTOMER-A protocols l2circuit neighbor 192.168.200.1 interface xe-0/0/2.0 virtual-circuit-id 2006
set apply-groups SERVICE-CUSTOMER-A

set groups SERVICE-CUSTOMER-B interfaces ge-0/0/4 unit 3300 description "L2L Customer B"
set groups SERVICE-CUSTOMER-B interfaces ge-0/0/4 unit 3300 encapsulation vlan-ccc
set groups SERVICE-CUSTOMER-B interfaces ge-0/0/4 unit 3300 vlan-id 3300
set groups SERVICE-CUSTOMER-B interfaces ge-0/0/4 unit 3300 family ccc
set groups SERVICE-CUSTOMER-B protocols l2circuit neighbor 192.168.200.1 interface ge-0/0/4.3300 virtual-circuit-id 3300
set apply-groups SERVICE-CUSTOMER-B

set groups SERVICE-CUSTOMER-C interfaces ge-0/0/5 unit 947 description "L2L Customer C"
set groups SERVICE-CUSTOMER-C interfaces ge-0/0/5 unit 947 encapsulation vlan-ccc
set groups SERVICE-CUSTOMER-C interfaces ge-0/0/5 unit 947 vlan-id 947
set groups SERVICE-CUSTOMER-C interfaces ge-0/0/5 unit 947 family ccc
set groups SERVICE-CUSTOMER-C protocols l2circuit neighbor 192.168.200.1 interface ge-0/0/5.947 virtual-circuit-id 2011
set apply-groups SERVICE-CUSTOMER-C