Did you try to cross the fiber? You can also try to loop the fiber (use one single fiber to connect the transmitter and the receiver of the same SFP) and confirm that the link comes up, this will confirm that the SFP is OK.
Also try to see if there is a light (red) coming from the SFP (before connecting the fiber) and then connect the fiber and by looking into the connector to see if there is a light (since it's a MM fiber you can see it, with OM you can't),
One last verification : "show interface status" will show you if the SFP is detected by the switch.
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In order to avoid some VSS dual-active scenario (we can't use fast-hello/ePAGP/BFD), we are thinking about passing the VSL trafic over MPLS (AToM/VPLS) since we have two distant 6500 and each one is connected to an MPLS Network, so L3 connection will still be working in case of direct link Failure (VSL Down)
Do you have any feedback regarding this kind of design, or do you think it's possible,
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Hi, I'm facing an issue since 2 month now , no one is able to tell me what's going on. The line goes down suddently for 2 or 3 minutes and this happens everyday at the same range (~2 or 3 hours) of time . I don't have any scheduled task to cause this. ISP in his side has also made some tshoot but found nothing and is convinced that the problem is coming from our side : Here is some log : Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9-M), Version 15.1(4)M4, RELEASE SOFTWARE (fc1) rtr-Id#show debugging Generic IP: IP packet errors debugging is on IP NAT ERROR debugging is on PPP: PPP authentication debugging is on PPP protocol errors debugging is on PPPoE: PPPoE protocol events debugging is on PPPoE protocol errors debugging is on PPPoA: PPP over ATM events debugging is on PPP over ATM errors debugging is on 2d00h: Sending PADI: Interface = Ethernet0 Jun 17 09:35:56.722: %CONTROLLER-5-UPDOWN: Controller VDSL 0, changed state to down Jun 17 09:36:05.102: %LINK-3-UPDOWN: Interface ATM0, changed state to down 2d00h: PPPoE:ATM0.1 8/35, Got ATM VC Event Jun 17 09:36:06.102: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to down 2d00h: padi timer expired 2d00h: Sending PADI: Interface = Ethernet0 2d00h: Vi1 PPP: Missed 5 keepalives, taking LCP down 2d00h: Vi1 PPP DISC: Missed too many keepalives 2d00h: Vi1 PPP: Sending Acct Event[Down] id 2d00h: PPP: NET STOP send to AAA. 2d00h: Vi1 IPCP: Event[DOWN] State[Open to Starting] 2d00h: Vi1 IPCP: Event[CLOSE] State[Starting to Initial] 2d00h: Vi1 LCP: O TERMREQ [Open] id 2 len 4 2d00h: Vi1 LCP: Event[CLOSE] State[Open to Closing] 2d00h: Vi1 PPP: Phase is TERMINATING 2d00h: Vi1 LCP: Event[DOWN] State[Closing to Initial] 2d00h: Vi1 PPP: Phase is DOWN ............. Some config : controller VDSL 0 ! bba-group pppoe global ! interface Ethernet0 no ip address shutdown pppoe-client dial-pool-number 1 no fair-queue ! interface ATM0 no ip address no atm ilmi-keepalive ! interface ATM0.1 point-to-point pvc 8/35 pppoe-client dial-pool-number 1 ! interface Vlan1 description --- Customer LAN --- ip address 192.168.1.254 255.255.255.0 ip nat inside ip virtual-reassembly in ip tcp adjust-mss 1452 ! interface Dialer0 description --- Internode ADSL --- ip address negotiated ip nbar protocol-discovery ip flow ingress ip nat outside ip inspect STAEFUL_FW out ip virtual-reassembly in max-reassemblies 64 ip virtual-reassembly out max-reassemblies 1024 encapsulation ppp dialer pool 1 dialer idle-timeout 0 dialer persistent dialer-group 1 ppp authentication pap chap callin ppp chap hostname EREG** ppp chap password 7 022416540A020D204*****
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