Cisco Ex SERIES Bedienungsanleitung PDF herunterladen (Seite 34)

Juniper Networks/Cisco Systems Switch Interoperability Cookbook

! ! !

Validation!

On the Juniper switch, the command show lldp neighbors will verify that the

Cisco switch is attached to interfaces xe-5/3/1 and xe-12/3/0:

admin@EX9208> show lldp neighbors

Local Interface Parent Interface Chassis Id Port info

System Name

xe-5/3/1 - 0c:27:24:ce:95:80 Te1/1/3

dc-tme-c3850-01.englab.juniper.net

xe-12/3/0 ae1 0c:27:24:ce:95:80 Te1/1/4

dc-tme-c3850-01.englab.juniper.net

Cisco Catalyst and Nexus switches also use the command show lldp neighbors:

Cat3850# show lldp neighbors

Capability codes:

(R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device

(W) WLAN Access Point, (P) Repeater, (S) Station, (O) Other

Device ID Local Intf Hold-time Capability Port ID

EX9208 Te1/1/4 120 B,R 1621

EX9208 Te1/1/3 120 B,R 1591

Multi@channel&link&aggregation&group&(MC@LAG)&

Objective!

To verify the ability of multiple Juniper switches to provide multi-channel link

aggregation groups, presenting a single logical interface to a Cisco Catalyst access switch

and to a Cisco core switch.

Background!

To attached switches, an MC-LAG looks and functions the same as standard 802.3ad link

aggregation: One or more physical interfaces on the attached switch bond together to

form a single logical interface.

The difference with MC-LAG is on the other end: A single logical interface spans

multiple physical switches, adding extra resiliency even if an entire switch fails. MC-

LAG uses standard LACP messages inside the link aggregation group (LAG), and passes

messages between switch chassis to monitor device state.

Switches attached to an MC-LAG require no special configuration beyond the usual link

aggregation commands.

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Cisco Ex SERIES Bedienungsanleitung Seite 34