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November 15th, 2023 10:25
VPC core to VLT leaf - Cisco Nexus C93180YC-FX3 to Dell S5232F-ON - Protocol Up, Link Up, Etherchannel Up, but no data transfer
CISCO NEXUS VPC and PO:vPC domain id : 10Peer status : peer adjacency formed okvPC keep-alive status : peer is aliveConfiguration consistency status : successPer-vlan consistency status : successType-2 consistency status : successvPC role : primaryNumber of vPCs configured : 5Peer Gateway : EnabledDual-active excluded VLANs : -Graceful Consistency Check : EnabledAuto-recovery status : DisabledDelay-restore status : Timer is off.(timeout = 30s)Delay-restore SVI status : Timer is off.(timeout = 10s)Delay-restore Orphan-port status : Timer is off.(timeout = 0s)Operational Layer3 Peer-router : DisabledVirtual-peerlink mode : DisabledvPC Peer-link status---------------------------------------------------------------------id Port Status Active vlans-- ---- ------ -------------------------------------------------1 Po100 up 10-12,14-16,18,20,30,32,66,80,90,97,110,130vPC status----------------------------------------------------------------------------Id Port Status Consistency Reason Active vlans-- ------------ ------ ----------- ------ ---------------10 Po30 up success success 10-12,14-16,18,20,30,32,66,80,90,97,110,13020 Po40 down* Not Consistency Check Not -Applicable Performed30 Po50 down* Not Consistency Check Not -Applicable Performed40 Po110 up success success 9050 Po120 down* success success -interface port-channel110description Dome-2 Channelswitchport mode trunkvpc 40DELL CONFIG:interface port-channel110description To_Nexus9kno shutdownswitchport mode trunkvlt-port-channel 110Domain ID : 1Unit ID : 2Role : secondaryVersion : 3.1Role priority : 8192VLT ::2Delay-Restore timer : 90 secondsPeer-Routing : EnabledPeer-Routing-Timeout timer : 0 secondsMulticast peer-routing timer : 300 secondsVLTi Link Statusport-channel1000 : upVLT Peer Unit ID System MAC Address Status IP Address Version----------------------------------------------------------------------------------1 up fda 3.1awr-dome-sw02# show port-channel summaryFlags: D - Down I - member up but inactive P - member up and activeU - Up (port-channel) F - Fallback Activated IND - LACP Individual--------------------------------------------------------------------------------Group Port-Channel Type Protocol Member Ports--------------------------------------------------------------------------------110 port-channel110 (D) Eth DYNAMIC 1/1/31(D) 1/1/32(D)1000 port-channel1000 (U) Eth STATIC 1/1/1(P) 1/1/2(P)All links show up, but a server on the 90 vlan is still not reachable. Am I missing anything here. Any help is much appreciated. Thanks.
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DELL-Charles R
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November 15th, 2023 19:51
Hello,
What is the server that us unreachable?
If it is just the one server; Have you confirmed it is configured correctly?
Could you post your #show running-configuration?
bala_tlt
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November 16th, 2023 04:20
Hello Charles,
Yes I can confirm that the server is configured correctly.
The issue is that when I remove the ports from the VLT domain, It gives me pings for like 10 seconds before something is blocking the comms.
!
interface port-channel110
description To_Nexus9k
no shutdown
switchport access vlan 90
vlt-port-channel 110
interface ethernet1/1/31
no shutdown
channel-group 110 mode active
no switchport
flowcontrol receive off
flowcontrol transmit off
!
interface ethernet1/1/32
no shutdown
channel-group 110 mode active
no switchport
flowcontrol receive off
flowcontrol transmit off
This is the config in the Dell.
bala_tlt
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November 21st, 2023 04:55
Hello Joey,
Yes here are the details.
show vlt 1 vlt-port-detail
vlt-port-channel ID : 110
VLT Unit ID Port-Channel Status Configured ports Active ports
-------------------------------------------------------------------------------
* 1 port-channel110 up 2 2
2 port-channel110 up 2 2
On both checks, VLT is up..
the weird part is that when i take the VLT down, I get momentary access to the switch for 11 pings before it goes down again. This happens when i take the vpc down on cisco end or the vlt down on dell end. Its after the reconvergence that drops the packets. What could be the suspect here ?