Specifications

Dynamic Host Configuration Protocol
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DHCP clients can send packets without Option 255 (EX9200)—On EX9200 switches,
starting with Junos OS Release 13.3R5, you can override the DHCP relay agent default
configuration and enable clients to send DHCP packets without Option 255. The default
behavior in Junos OS is to drop packets that do not include Option 255. To override
that default behavior, configure the allow-no-end-options CLI statement under the
[edit forwarding-options dhcp-relay overrides] hierarchy level.
You can also override the DHCP local server configuration and enable clients to send
DHCP packets without Option 255 (end-of-options). The default behavior in Junos OS
is to drop packets that do not include Option 255. To override that default behavior,
configure the allow-no-end-options statement under the [system services
dhcp-local-server overrides] hierarchy level.
High Availability and Resilency
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New redundancy failover CLI statement (EX Series)—Starting in Junos OS
Release13.3R6, the chassis redundancy failover not-on-disk-underperform statement
prevents gstatd from causing failovers in the case of slow disks on the Routing Engine.
See not-on-disk-underperform and Preventing Graceful Restart in the Case of Slow Disks.
Interfaces and Chassis
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Direct ARP entries to the correct next-hop interface in an MC-LAG scenario—On
EX9200 switches, the arp-l2-validate statement provides a workaround for issues
related to MAC and ARP entries going out of sync in an MC-LAG scenario. Use the
command to correct mismatches between MAC and ARP entries related to the next-hop
interface.
•
Additional options for the request support information command—On EX9200
switches, the following CLI commands have been added to the output of the request
support information CLI command:
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show ethernet-switching interface detail
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show ethernet-switching table
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show spanning-tree bridge detail
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show spanning-tree interface
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show vlans extensive
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show vrrp summary
User Interface and Configuration
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Change in the show version command output on EX9200 switches—Starting with
Junos OS Release 13.3, the show version command output includes the Junos field that
displays the Junos OS version running on the switch. This new field is in addition to the
existing field in the show version command that displays a list of installed subpackages
running on the switch that display the Junos OS version number of those subpackages.
9Copyright © 2015, Juniper Networks, Inc.
Changes in Behavior and Syntax