Arista Switch:DCS-7050QX-32-R
- DCS-7050QX-N(config-if-Et24/2)#show inventory
- DCS-7050QX-N(config-if-Et32)#show interface ethernet 23/1-4 status
Breakout Interfaces
QSFP+ Ethernet Interface Configuration Each QSFP+ module Ethernet interface is configurable as a single 40G port or as four 10G ports.
The switch displays four ports for each interface. Each port’s status depends on the interface configuration: • The /1 port is active (connected or not connected), regardless of the interface configuration. • The /2, /3, and /4 ports are error-disabled when the interface is configured as a single 40G port; • all ports are active (connected or not connected), when the interface is configured as four 10G ports.
Example:
• On DCS-7050S-64, interface 49 is a QSFP+ interface. Its ports are listed as 49/1, 49/2, 49/3, and 49/4. Port status depends on the interface configuration:
— 40G port configuration: 49/1 is connected or not connected; 49/2, 49/3, and 49/4 are error-disabled.
— 4x10G port configuration: 49/1, 49/2, 49/3, and 49/4 status is connected or not connected.
The speed forced 40gfull command configures a QSFP+ Ethernet interface as a 40G port. The no speed forced 40gfull command configures a QSFP+ Ethernet interface as four 10G ports. These commands reset the forwarding agent, which disrupts traffic on all switch ports. These commands must be applied to the /1 port.
Unordered List ItemEnter Interface Ethernet configuration mode for port /1 of the QSFP+ Ethernet interface.
switch(config)#interface ethernet 49/1
Enter speed force 40gfull command:
switch(config-if-Et49/1)#speed forced 40gfull
Note: This step restarts the forwarding agent, which disrupts traffic on all switch ports. The agent may require more than a minute to restart.
Enter show interface status to confirm the change in configuration.
switch(config-if-Et49/1)#show interface status
To configure a QSFP+ Ethernet interface as four 10G port interfaces:
Enter Interface Ethernet mode for port /1 of the QSFP+ interface.
switch(config)#interface ethernet 49/1
switch(config-if-Et49/1)#
Enter no speed force 40gfull command.
switch(config-if-Et49/1)#no speed forced 40gfull
switch(config-if-Et49/1)#
Example:
interface Port-Channel1 description Link to 6400 IP: 172.25.25.1 switchport mode trunk port-channel min-links 1 ! interface Port-Channel2 description Link to sw 1 IP: 172.25.25.10 switchport access vlan 528 port-channel min-links 2 ! interface Port-Channel3 description Link to sw 2 IP: 172.25.25.11 switchport access vlan 529 port-channel min-links 4
!
interface Ethernet1/1 description Link to 6400 IP: 172.25.25.1 no speed forced 40gfull channel-group 1 mode active ! interface Ethernet1/2 description Link to 6400 IP: 172.25.25.1 no speed forced 40gfull channel-group 1 mode active ! interface Ethernet1/3 description Link to 6400 IP: 172.25.25.1 no speed forced 40gfull channel-group 1 mode active ! interface Ethernet1/4 description Link to 6400 IP: 172.25.25.1 no speed forced 40gfull channel-group 1 mode active ! interface Ethernet13/1 description Link 1 40Gbps - IP: 10.23.23.10/27 speed forced 40gfull switchport switchport mode acc switchport access vlan 526 ! interface Ethernet14/1 description Link 2 40Gbps - IP: 10.23.23.11/27 speed forced 40gfull switchport switchport mode acc switchport access vlan 526 ! interface Ethernet15/1 description Link 3 40Gbps - IP: 10.23.23.12/27 speed forced 40gfull switchport switchport mode acc switchport access vlan 526 ! interface Ethernet16/1 description Link 4 10Gbps - IP: 10.23.23.13/27 no speed forced 40gfull switchport switchport mode acc switchport access vlan 526 ! interface Ethernet16/2 description Link 5 10Gbps - IP: 10.23.23.14/27 no speed forced 40gfull switchport switchport mode acc switchport access vlan 526 ! interface Ethernet17/1 description Link 6 10Gbps - IP: 10.23.23.15/27 no speed forced 40gfull switchport switchport mode acc switchport access vlan 526 ! interface Ethernet17/2 description TIER2 NS2PMDF - IP: 172.18.0.6/27 no speed forced 40gfull switchport switchport mode acc switchport access vlan 526
DCS-7050QX-N#show version Arista DCS-7050QX-32-R Hardware version: 02.11 Serial number: JP354652567 System MAC address: 001c.73b2.2a71 Software image version: 4.13.7.3M Architecture: i386 Internal build version: 4.13.7.3M-2126951.41373M.1 Internal build ID: 6f0a27e9-328e-453c-a66c-927e4912171a Uptime: 16 weeks, 4 days, 15 hours and 46 minutes Total memory: 3990492 kB Free memory: 1647764 kB
configure terminal interface Port-Channel1 lacp mode active (or lacp mode passive) port-channel load-balance src-dst-ip interface EthernetX channel-group 1 mode active
active: Enables LACP in active mode. passive: Enables LACP in passive mode. on: Static LAG without LACP negotiation. interface Port-Channel1 switchport mode trunk switchport trunk allowed vlan <vlan-list> interface Port-Channel1 switchport mode access switchport access vlan <vlan-id>
- show interfaces port-channel
- show lacp neighbor
- show vlan
write memory
Example
configure terminal interface Port-Channel1 switchport mode access switchport access vlan 10 lacp mode active exit interface Ethernet1 channel-group 1 mode active exit interface Ethernet2 channel-group 1 mode active exit
write memory
User password
configure enable secret <your_password> username admin secret StrongPassword123 username manager secret AnotherPassword456 username admin role network-admin username manager role network-operator end write mem copy running-config startup-config
Configure VLAN 1 interface
configure interface vlan 1 ip address 172.16.28.36 255.255.254.0 no shutdown ip default-gateway 172.16.28.1 ip route 0.0.0.0/0 172.16.28.1
- show ip interface brief
- show ip route
Enable Multicast Routing on the Switch
configure ip routing ip multicast-routing Switch(config)# vlan 10 Switch(config-vlan)# ip igmp snooping Switch(config)# interface vlan 10 Switch(config-if)# ip igmp snooping querier Switch(config)# interface vlan 10 Switch(config-if)# ip pim sparse-mode
- show ip igmp snooping
- show ip mroute
- show ip pim neighbors
Link Aggregation (LAG)
vlan 10 name Users vlan 20 name Servers # Enter global configuration mode configure terminal # Create a LAG group (e.g., LAG group 1) interface Ethernet1/1-2 # The physical interfaces you want to aggregate channel-group 1 mode active # Enable LACP (active mode) no shutdown # Assign the LAG to a virtual interface interface Port-Channel 1 port-channel min-links 2 description LAG to Aruba OCX Switch switchport switchport mode trunk # Allow VLANs 10 and 20 switchport trunk allowed vlan 10,20 no shutdown
interface Port-Channel2 switchport switchport mode access switchport access vlan 10 # Assign VLAN 10 no shutdown
# Save the configuration write memory
- show interfaces ethernet 1/1-2
- show port-channel summary
- show active
Enable LLDP
configure terminal lldp run write memory interface Ethernet1/1 lldp transmit lldp receive no shutdown interface Ethernet1/2 lldp transmit lldp receive no shutdown interface Ethernet1/3 lldp transmit lldp receive no shutdown interface Ethernet1/4 lldp transmit lldp receive no shutdown
- show lldp neighbors
- show lldp neighbors detail
- show lldp
- show lldp interface Ethernet1
- debug lldp events
- debug lldp packets
- no debug all
Spanning Tree Protocol (STP)
configure terminal # Enable Rapid STP (Recommended) spanning-tree mode rapid-pvst # OR enable traditional STP # spanning-tree mode stp # OR enable MSTP (for multiple VLAN support) # spanning-tree mode mstp write memory spanning-tree vlan 1 priority 12288 spanning-tree vlan 500 priority 12288 spanning-tree vlan 501 priority 12288 spanning-tree vlan 502 priority 12288 spanning-tree vlan 503 priority 12288 spanning-tree vlan 504 priority 12288 spanning-tree vlan 505 priority 12288 spanning-tree vlan 506 priority 12288
For access ports (connected to endpoints like PCs/servers), use PortFast to speed up link transitions:
interface Ethernet1 spanning-tree portfast no shutdown
This prevents unnecessary STP calculations when connecting non-switch devices.
spanning-tree vlan 1 priority 4096 spanning-tree vlan 10 priority 4096
This forces VLAN 1 and VLAN 10 to select this switch as the root.
interface Ethernet3 spanning-tree bpdufilter enable spanning-tree bpduguard enable no shutdown
BPDU Filter: Stops sending/receiving STP packets on that port. BPDU Guard: Disables the port if it receives STP packets (useful on access ports).
- show spanning-tree
- show spanning-tree vlan 1
- show spanning-tree interface Ethernet1
ip igmp snooping
configure terminal ip igmp snooping write memory vlan 1 ip igmp snooping vlan 500 ip igmp snooping vlan 501 ip igmp snooping vlan 502 ip igmp snooping vlan 503 ip igmp snooping vlan 504 ip igmp snooping
DCS-7050QX-N(config)#show ip igmp sno Global IGMP Snooping configuration: ------------------------------------------- IGMP snooping : Enabled Robustness variable : 2 Report flooding : Disabled Vlan 1 : ---------- IGMP snooping : Enabled IGMPv2 immediate leave : Enabled Multicast router learning mode : pim-dvmrp IGMP max group limit : No limit set Recent attempt to exceed limit : No Report flooding : Disabled IGMP snooping pruning active : False Flooding traffic to VLAN : True Vlan 500 : ---------- IGMP snooping : Enabled IGMPv2 immediate leave : Enabled Multicast router learning mode : pim-dvmrp IGMP max group limit : No limit set Recent attempt to exceed limit : No Report flooding : Disabled IGMP snooping pruning active : False Flooding traffic to VLAN : True
vlan 500 ip igmp snooping querier ip igmp snooping querier address 192.168.1.1
interface Vlan500 ip address 192.168.1.1/24 ip igmp version 2 ip pim sparse-mode
ip igmp version 3
- show ip igmp snooping
- show ip igmp groups
- show ip igmp snooping querier
MTU
interface Ethernet3 mtu 9214
7050QX Series 10/40G Data Center Switches
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Quick Start Guide 7000 Series 1 RU-Gen 3 Data Center Switches
User guide Arista Extensible Operating System (EOS)