100G ports VRF Configuration "Link not connected"issue

narmali · ‎10-24-2017

I am using one 100G line card (N77-M312CQ-26L) on Nexus 7710 Chassis. I am configuring VRF to all the ports of 100G line card to run L3 traffic. First two port of the line card connected to Spirent Test-center to send and receive the traffic and all other ports are loop-backed. I am using QSFP-100G-SR4-S for all the ports with 12F OM3 fiber optic cable.

I have given the below IP configuration for first two port and other are normally configured.

interface Ethernet1/1
description Connected to Spirent TestCenter port 101.0.0.2:1:1
mtu 9216
mac-address 0000.0000.0301
vrf member vrfp1_1-1_3
ip address 101.0.0.1 255.255.255.0
no shutdown

interface Ethernet1/2
description Connected to Spirent TestCenter port 200.0.0.2:1:2
mtu 9216
mac-address 0000.0000.0302
vrf member vrfp1_12-1_2
ip address 200.0.0.1 255.255.255.0
no shutdown

After giving the IP and VRF configuration to all the ports are UP except first two ports as below:

switch# sh int br

--------------------------------------------------------------------------------
Port VRF Status IP Address Speed MTU
--------------------------------------------------------------------------------
mgmt0 -- down 192.168.0.46 -- 1500

--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Por
t
Interface Ch
#
--------------------------------------------------------------------------------
Eth1/1 -- eth routed down Link not connected auto(D) --
Eth1/2 -- eth routed down Link not connected auto(D) --
Eth1/3 -- eth routed up none 100G(D) --
Eth1/4 -- eth routed up none 100G(D) --
Eth1/5 -- eth routed up none 100G(D) --
Eth1/6 -- eth routed up none 100G(D) --
Eth1/7 -- eth routed up none 100G(D) --
Eth1/8 -- eth routed up none 100G(D) --
Eth1/9 -- eth routed up none 100G(D) --
Eth1/10 -- eth routed up none 100G(D) --
Eth1/11 -- eth routed up none 100G(D) --
Eth1/12 -- eth routed up none 100G(D) --

I am getting this Link not connected issue for the first two ports.

Please let me know what could be the problem with configuration side.

Wes Austin · ‎10-24-2017

Did the links work before you added config?

'Link not connected' usually indicated a physical layer issue. What SFP do you have on the Spirent side?

I would loop back the two interfaces on the Nexus, if they come online, you need to ensure correct optics are used between N77 and Spirent.

narmali · ‎10-24-2017

when I loop back both line card ports (1 & 2) it works.

I am using same QSFP (100g-SR4-S) as that of Line card ports, on Spirent side.

After connecting to individual ports of Spirent and giving configuration commands, it shows Link not connected.