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Juniper Networks/Cisco Systems Switch Interoperability Cookbook

! ! !

These commands are for a Cisco Catalyst 3850. On Cisco Nexus devices running NX-

OS, the main difference is that each physical interface must be explicitly enabled with a

“no shutdown” command. For example, these commands put interface Ethernet3/9

into Port-channel 2:

Nexus7010(config)# interface Ethernet3/9

Nexus7010(config-if)# description linkagg to ex9200 xe-5/0/5 and xe-12/0/5

Nexus7010(config-if)# switchport

Nexus7010(config-if)# switchport mode trunk

Nexus7010(config-if)# channel-group 2 mode passive

Nexus7010(config-if)# no shutdown

Nexus7010(config-if)# end

Validation!

The Junos command “show lacp interfaces <aggregated Ethernet

interface>” will show LAG state. The following command was run after disabling

interface xe-12/3/0, and validates that LACP on both switches dynamically removed the

second member of the LAG. Note that interface xe-12/3/0 is in “Detached” state:

admin@EX9200# run show lacp interfaces ae1

Aggregated interface: ae1

LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity

xe-5/3/1 Actor No No Yes Yes Yes Yes Fast

Active

xe-12/3/0 Partner No No Yes Yes Yes Yes Slow

Active

xe-5/3/1 Actor No Yes No No No Yes Fast

Active

xe-12/3/0 Partner No Yes No No No Yes Fast

Passive

LACP protocol: Receive State Transmit State Mux State

xe-5/3/1 Current Slow periodic Collecting distributing

xe-12/3/0 Port disabled No periodic Detached

Link@Layer&Discovery&Protocol&(LLDP)&

Objective!

To verify the ability of Juniper and Cisco switches to exchange capabilities information

using LLDP.

Background!

LLDP, as described in the IEEE 802.1AB specification, is a standards-based method of

exchanging device capabilities. Unlike Cisco Discovery Protocol (CDP), covered

elsewhere in this document, LLDP is an open standard, and thus allows multiple

vendors’ devices to exchange capabilities data.

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Cisco Ex SERIES Manual de usuario Pagina 30