Problem:
How to shutdown a Juniper switchport or interface. This simple JUNOS task frustrates Cisco-minded folks. So where does JUNOS hide the shutdown command?
Solution:
"Disable" is the JUNOS command for "shutdown". Examples:
Disable:
root@host> set interface ge-0/0/1 disable
Enable
root@host> del set interface ge-0/0/1 disable
That's it!
Problem: Duplex mismatch on Juniper EX Switches. Juniper Gigabit switch-ports run at half duplex when connecting to 100Mb interfaces (e.g., EX2200 uplink to SSG).
Troubleshoot: Confirm the interface state from the switch port: (a) Check for outbound collisions and (b) Autonegotiation status.
root@EX2200> show interfaces ge-0/0/0 extensive
Solution: Disable autonegotiation on the switch port. Manually configure interface link settings:
root@EX2200# delete interfaces ge-0/0/0 ether-options auto-negotiation
root@EX2200# set interfaces ge-0/0/0 ether-options speed 100
root@EX2200# set interfaces ge-0/0/0 ether-options full-duplex
root@EX2200# set interfaces ge-0/0/0 ether-options no-auto-negotiation
MDI Consideration: Disabling auto-negotiation also disables auto-mdix. This has no impact for crossover cables. However, no data will pass with straight-through cables.
Straight-through cables can be used by disabling mdi-x detection and setting the mdi mode.
- mdi mode sets the interface to straigh-through mode.
- mdix mode sets the interface to crossover mode.
root@EX2200# set interfaces ge-0/0/0 gigether-options no-auto-mdix
root@EX2200# set interfaces ge-0/0/0 ether-options mdix
Troubleshoot Example:
root@EX2200> show interfaces ge-0/0/0 extensive
Physical interface: ge-0/0/0, Enabled, Physical link is Up
Interface index: 129, SNMP ifIndex: 501, Generation: 132
Description: Uplink-To-SRX Gateway
Link-level type: Ethernet, MTU: 1514, Speed: Auto, Duplex: Auto, BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled,
Flow control: Enabled, Auto-negotiation: Enabled, Remote fault: Online, Media type: Copper Device flags : Present Running
Interface flags: SNMP-Traps Internal: 0x4000
Link flags : None
CoS queues : 8 supported, 8 maximum usable queues
Hold-times : Up 0 ms, Down 0 ms
Current address: 54:e0:32:0a:63:03, Hardware address: 54:e0:32:0a:63:03
Last flapped : 2015-11-05 18:50:43 UTC (04:53:31 ago)
Statistics last cleared: Never
Traffic statistics:
Input bytes : 1256633066638 82512 bps
Output bytes : 1392350385008 1076248 bps
Input packets: 1770081587 101 pps
Output packets: 1603112698 117 pps
IPv6 transit statistics:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets: 0
Input errors:
Errors: 0,
Drops: 0, Framing errors: 0, Runts: 0, Policed discards: 0, L3 incompletes: 0, L2 channel errors: 0,L2 mismatch timeouts: 0, FIFO errors: 0, Resource errors: 0 Output errors:
Carrier transitions: 3, Errors: 0, Drops: 0, Collisions: 247932333, Aged packets: 0, FIFO errors: 0, HS link CRC errors: 0, MTU errors: 0, Resource errors: 0
Egress queues: 8 supported, 4 in use
Queue counters: Queued packets Transmitted packets Dropped packets
0 best-effort
0 1702583017 366
1 assured-forw 0 0 0
5 expedited-fo 0 0 0
7 network-cont 0 1795806 0
Queue number: Mapped forwarding classes
0 best-effort
1 assured-forwarding
5 expedited-forwarding
7 network-control
Active alarms : None
Active defects : None
MAC statistics: Receive Transmit
Total octets 1256864002527 1392689372675
Total packets 1770488775 1603506730
Unicast packets 1769692120 1579600991
Broadcast packets 796655 15971137
Multicast packets 0 7934602
CRC/Align errors 0 0
FIFO errors 0 0
MAC control frames 0 0
MAC pause frames 0 0
Oversized frames 0
Jabber frames 0
Fragment frames 0
Code violations 0
Autonegotiation information:
Negotiation status: Incomplete
Local resolution:
Local link Speed: 100 Mbps, Link mode: Half-duplex
Packet Forwarding Engine configuration:
Destination slot: 0 (0x00)
CoS information:
Direction : Output
CoS transmit queue
References:
http://www.juniper.net/documentation/en_US/junos14.2/topics/reference/configuration-statement/no-auto-mdix-edit-interfaces.html
https://www.juniper.net/documentation/en_US/junos15.1/topics/reference/configuration-statement/mdi-mode-edit-interfaces.html
http://www.juniper.net/documentation/en_US/junos14.1/topics/task/configuration/ex-series-gigabit-interfaces-cli.html
Config sample to enable S-Flow with SolarWinds:
sflow agent ip x.x.x.x
sflow collector ip x.x.x.x port 2055
sflow interval 60
interface GigabitEthernet1/0/2
broadcast-suppression pps 3000
undo jumboframe enable
stp disable
stp edged-port enable
sflow enable inbound
sflow enable outbound
sflow sampling-rate 1000
Last updated 9/7/11 by Steven Jordan
Problem:
Enable and configure S-Flow on a Fortigate firewall. Send samples to S-flow collector (e.g., Solarwinds Netflow).
Solution:
Configuration steps to enable S-Flow on a Fortigate 200B for use with the Solarwinds Netflow collector:
FG200xxx (interface) #config system sflow
FG200xxx (interface) #set collector-ip x.x.x.x
FG200xxx (interface) #set collector-port 2055
FG200xxx (interface) #end
FG200Bxxx (interface) # config sys interface
FG200Bxxx (interface) #edit
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FG200Bxxx (portx) # set sflow-sampler enable
FG200Bxxx(portx) # set sample-rate 1000
FG200Bxxx (portx) # set sample-direction both
FG200Bxxx (portx) # set polling-interval 20
FG200xxx (portx) # next
FG200xxx (portx) # end
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