Check whether backend (pslave) or frontend (slave) interfaces are UP. In the example below, some frontend interfaces are down.
admin@ecs-n01:~> viprexec -i 'ip link show | egrep "slave-|public"'
Output from host : 192.168.219.1
2: pslave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
3: pslave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
4: slave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
5: slave-1: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master public state DOWN mode DEFAULT group default qlen 1000
7: public: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
Output from host : 192.168.219.2
2: pslave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
3: pslave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
4: slave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
5: slave-1: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master public state DOWN mode DEFAULT group default qlen 1000
7: public: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
Output from host : 192.168.219.3
2: pslave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
3: pslave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
4: slave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
5: slave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
7: public: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
Output from host : 192.168.219.4
2: pslave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
3: pslave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
4: slave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
5: slave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
7: public: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
Output from host : 192.168.219.5
2: pslave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
3: pslave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
4: slave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
5: slave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
14: public: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
Output from host : 192.168.219.6
2: pslave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
3: pslave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
4: slave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
5: slave-1: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master public state DOWN mode DEFAULT group default qlen 1000
7: public: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
Output from host : 192.168.219.7
2: pslave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
3: pslave-1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 9000 qdisc mq master private state UP mode DEFAULT group default qlen 1000
4: slave-0: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master public state UP mode DEFAULT group default qlen 1000
5: slave-1: <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP> mtu 1500 qdisc mq master public state DOWN mode DEFAULT group default qlen 1000
12: public: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
admin@ecs-n01:~>
Another way of checking link up/down on all interfaces, is using ethtool command.
admin@ecs-n01:~> viprexec "sudo ethtool slave-0 | egrep 'Settings|Link detected'; sudo ethtool slave-1 | egrep 'Settings|Link detected'; sudo ethtool pslave-0 | egrep 'Settings|Link detected'; sudo ethtool pslave-1 | egrep 'Settings|Link detected'"
Output from host : 192.168.219.1
Settings for slave-0:
Link detected: yes
Settings for slave-1:
Link detected: no
Settings for pslave-0:
Link detected: yes
Settings for pslave-1:
Link detected: yes
Output from host : 192.168.219.5
Settings for slave-0:
Link detected: yes
Settings for slave-1:
Link detected: yes
Settings for pslave-0:
Link detected: yes
Settings for pslave-1:
Link detected: yes
Output from host : 192.168.219.7
Settings for slave-0:
Link detected: yes
Settings for slave-1:
Link detected: no
Settings for pslave-0:
Link detected: yes
Settings for pslave-1:
Link detected: yes
Output from host : 192.168.219.6
Settings for slave-0:
Link detected: yes
Settings for slave-1:
Link detected: no
Settings for pslave-0:
Link detected: yes
Settings for pslave-1:
Link detected: yes
Output from host : 192.168.219.2
Settings for slave-0:
Link detected: yes
Settings for slave-1:
Link detected: no
Settings for pslave-0:
Link detected: yes
Settings for pslave-1:
Link detected: yes
Output from host : 192.168.219.3
Settings for slave-0:
Link detected: yes
Settings for slave-1:
Link detected: yes
Settings for pslave-0:
Link detected: yes
Settings for pslave-1:
Link detected: yes
Output from host : 192.168.219.4
Settings for slave-0:
Link detected: yes
Settings for slave-1:
Link detected: yes
Settings for pslave-0:
Link detected: yes
Settings for pslave-1:
Link detected: yes
admin@ecs-n01:~>
Check connections to the switches, using lldpcli command. This way you will see to which switch / port every interface is connected.
admin@ecs-n03:~> sudo lldpcli show neighbor
-------------------------------------------------------------------------------
LLDP neighbors:
-------------------------------------------------------------------------------
Interface: pslave-0, via: LLDP, RID: 4, Time: 24 days, 20:36:14
Chassis:
ChassisID: mac d8:9e:f3:xx:xx:xx
SysName: fox
SysDescr: Dell EMC Networking OS10-Enterprise.
Copyright (c) 1999-2019 by Dell Inc. All Rights Reserved.
System Description: OS10 Enterprise.
OS Version: 10.4.3.6C1.
System Type: S5148F-ON
Capability: Repeater, on
Capability: Bridge, on
Capability: Router, on
Port:
PortID: ifname ethernet1/1/3
PortDescr: Nile Node03
TTL: 120
Unknown TLVs:
TLV: OUI: F8,B1,56, SubType: 21, Len: 7 43,4E,56,30,30,51,32
TLV: OUI: F8,B1,56, SubType: 22, Len: 1 20
TLV: OUI: F8,B1,56, SubType: 23, Len: 1 20
TLV: OUI: F8,B1,56, SubType: 24, Len: 1 20
-------------------------------------------------------------------------------
Interface: pslave-1, via: LLDP, RID: 1, Time: 24 days, 20:36:14
Chassis:
ChassisID: mac d8:9e:f3:xx:xx:xx
SysName: hound
SysDescr: Dell EMC Networking OS10-Enterprise.
Copyright (c) 1999-2019 by Dell Inc. All Rights Reserved.
System Description: OS10 Enterprise.
OS Version: 10.4.3.6C1.
System Type: S5148F-ON
Capability: Repeater, on
Capability: Bridge, on
Capability: Router, on
Port:
PortID: ifname ethernet1/1/3
PortDescr: Nile Node03
TTL: 120
Unknown TLVs:
TLV: OUI: F8,B1,56, SubType: 21, Len: 7 43,50,34,30,30,51,32
TLV: OUI: F8,B1,56, SubType: 22, Len: 1 20
TLV: OUI: F8,B1,56, SubType: 23, Len: 1 20
TLV: OUI: F8,B1,56, SubType: 24, Len: 1 20
-------------------------------------------------------------------------------
Interface: slave-0, via: LLDP, RID: 2, Time: 0 day, 04:50:25
Chassis:
ChassisID: mac 4c:71:0d:xx:xx:xx
SysName: nx-sw01
SysDescr: Cisco Nexus Operating System (NX-OS) Software 10.2(5)
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2023, Cisco Systems, Inc. All rights reserved.
MgmtIP: 172.25.123.3
Capability: Bridge, on
Capability: Router, on
Port:
PortID: ifname Ethernet1/23
PortDescr: ecs-n03 s0
TTL: 120
Unknown TLVs:
TLV: OUI: 00,01,42, SubType: 8, Len: 11 46,44,4F,32,33,33,37,30,54,38,31
-------------------------------------------------------------------------------
Interface: slave-1, via: LLDP, RID: 5, Time: 0 day, 04:46:45
Chassis:
ChassisID: mac 4c:71:0d:xx:xx:xx
SysName: nx-sw02
SysDescr: Cisco Nexus Operating System (NX-OS) Software 10.2(5)
TAC support: http://www.cisco.com/tac
Copyright (c) 2002-2023, Cisco Systems, Inc. All rights reserved.
MgmtIP: 172.25.123.4
Capability: Bridge, on
Capability: Router, on
Port:
PortID: ifname Ethernet1/23
PortDescr: ecs-n03 s1
TTL: 120
Unknown TLVs:
TLV: OUI: 00,01,42, SubType: 1, Len: 1 01
TLV: OUI: 00,01,42, SubType: 8, Len: 11 46,44,4F,32,33,33,37,30,54,35,46
-------------------------------------------------------------------------------
admin@ecs-03:~>
Display all information about an interface using ethtool command:
admin@ecs-n01:~> sudo ethtool slave-0
Settings for slave-0:
Supported ports: [ FIBRE ]
Supported link modes: 10000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: No
Advertised link modes: 10000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 10000Mb/s
Duplex: Full
Port: Direct Attach Copper
PHYAD: 0
Transceiver: internal
Auto-negotiation: off
Supports Wake-on: g
Wake-on: g
Current message level: 0x0000000f (15)
drv probe link timer
Link detected: yes
admin@ecs-n01:~>
Using the -m parameter on the ethtool command, it will return info regarding the connected module (transceiver):
admin@ecs-n01:~> sudo ethtool -m slave-0
Identifier : 0x03 (SFP)
Extended identifier : 0x04 (GBIC/SFP defined by 2-wire interface ID)
Connector : 0x21 (Copper pigtail)
Transceiver codes : 0x01 0x00 0x00 0x00 0x41 0x84 0x80 0x55
Transceiver type : Infiniband: 1X Copper Passive
Transceiver type : FC: short distance (S)
Transceiver type : FC: Electrical inter-enclosure (EL)
Transceiver type : FC: Electrical intra-enclosure (EL)
Transceiver type : Passive Cable
Transceiver type : FC: Twin Axial Pair (TW)
Transceiver type : FC: 800 MBytes/sec
Transceiver type : FC: 400 MBytes/sec
Transceiver type : FC: 200 MBytes/sec
Transceiver type : FC: 100 MBytes/sec
Encoding : 0x00 (unspecified)
BR, Nominal : 10300MBd
Rate identifier : 0x00 (unspecified)
Length (SMF,km) : 0km
Length (SMF) : 0m
Length (50um) : 0m
Length (62.5um) : 0m
Length (Copper) : 5m
Length (OM3) : 0m
Passive Cu cmplnce. : 0x01 (SFF-8431 appendix E) [SFF-8472 rev10.4 only]
Vendor name : Amphenol
Vendor OUI : 78:a7:14
Vendor PN : 616740005
Vendor rev : C
Option values : 0x00 0x00
BR margin, max : 0%
BR margin, min : 0%
Vendor SN : CN0358XXXXXXXXXX
Date code : 180622
admin@ecs-n01:~>
If no transceiver is inserted, ethtool -m command will return an eror:
admin@ecs-n01:~> sudo ethtool -m slave-1
Cannot get module EEPROM information: Invalid argument
admin@ecs-n01:~>
