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Verifying Interface Configuration
To verify an interface configuration, perform these tasks:
Verifying Channelized
Interfaces
Purpose
Verify that your configurations for the channelized interfaces are correct.
Action
From the CLI, enter the show interfaces ce1-3/0/1 command.
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show interfaces ce1-3/0/1
Physical interface: ce1-3/0/1, Enabled, Physical link is Up
Interface index: 151, SNMP ifIndex: 28
Link-level type: Controller, Clocking: Internal, Speed: E1, Loopback: None,
Framing: G704, Parent: None
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps Internal: 0x4000
Link flags : None
CoS queues : 8 supported, 8 maximum usable queues
Last flapped : 2006-10-05 21:11:48 PDT (06:45:04 ago)
DS1 alarms : None
DS1 defects : None
Line encoding: HDB3
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What it Means
The output shows a summary of interface information.
Verifying Clear-Channel Interfaces
Purpose
Verify that your configurations for the clear-channel interfaces are
correct.
Action
From the CLI, enter the show interfaces e1-3/0/1 command.
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show interfaces e1-3/0/1
Physical interface: e1-3/0/1, Enabled, Physical link is Up
Interface index: 212, SNMP ifIndex: 237
Link-level type: PPP, MTU: 1504, Speed: E1, Loopback: None, FCS: 16,
Parent: ce1-3/0/1 Interface index 151
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps Internal: 0x4000
Link flags : Keepalives
Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
Keepalive: Input: 1066 (00:00:02 ago), Output: 1066 (00:00:02 ago)
LCP state: Opened
NCP state: inet: Opened, inet6: Opened, iso: Not-configured, mpls:
Not-configured
CHAP state: Closed
CoS queues : 8 supported, 8 maximum usable queues
Last flapped : 2006-10-06 01:01:36 PDT (02:57:27 ago)
Input rate : 88 bps (0 pps)
Output rate : 58144 bps (157 pps)
DS1 alarms : None
DS1 defects : None
Logical interface e1-3/0/1.0 (Index 66) (SNMP ifIndex 238)
Flags: Point-To-Point SNMP-Traps 0x4000 Encapsulation: PPP
Bandwidth: 1984kbps
Protocol inet, MTU: 1500
Flags: None
Addresses, Flags: Is-Preferred Is-Primary
Destination: 47.47.47.0/30, Local: 47.47.47.2, Broadcast: 47.47.47.3
Protocol inet6, MTU: 1500
Flags: None
Addresses, Flags: Is-Preferred Is-Primary
Destination: 8b8b:8b01::/64, Local: 8b8b:8b01::2
Addresses, Flags: Is-Preferred
Destination: fe80::/64, Local: fe80::205:85ff:fec5:d3d0
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What it Means
The output shows a summary of interface information. Although the parent
interface is ce1-3/0/1, the physical and logical clear-channel interfaces
are named e1-3/0/1 and e1-3/0/1.0.
Verifying the Link State of All Interfaces
Purpose
By using the ping tool on each peer address in the network, verify
that all interfaces on the Services Router are operational.
Action
For each interface on the Services Router:
- In the J-Web interface, select Diagnose>Ping
Host.
- In the Remote Host box, type the address of the interface
for which you want to verify the link state.
- Click Start. Output appears on a separate
page.
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PING 10.10.10.10 : 56 data bytes
64 bytes from 10.10.10.10: icmp_seq=0 ttl=255 time=0.382 ms
64 bytes from 10.10.10.10: icmp_seq=1 ttl=255 time=0.266 ms
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What it Means
If the interface is operational, it generates an ICMP response. If this
response is received, the round-trip time in milliseconds is listed in the time field.
For more information about the output, see the J-series Services Router Administration Guide.
For more information about using the J-Web interface to
ping a host, see the J-series Services Router Administration Guide.
For information about the ping command, see the J-series Services Router Administration Guide or
the JUNOS Protocols, Class of Service, and System Basics Command Reference.
Verifying Interface Properties
Purpose
Verify that the interface properties are correct.
Action
From the CLI, enter the show interfaces detail command.
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user@host> show interfaces detail
Physical interface: fe-1/0/0, Enabled, Physical link is Up
Interface index: 134, SNMP ifIndex: 27, Generation: 17
Link-level type: Ethernet, MTU: 1514, Speed: 100mbps, Loopback: Disabled,
Source filtering: Disabled, Flow control: Enabled
Device flags : Present Running
Interface flags: SNMP-Traps 16384
Link flags : None
CoS queues : 4 supported
Hold-times : Up 0 ms, Down 0 ms
Current address: 00:90:69:87:44:9d, Hardware address: 00:90:69:87:44:9d
Last flapped : 2004-08-25 15:42:30 PDT (4w5d 22:49 ago)
Statistics last cleared: Never
Traffic statistics:
Input bytes : 0 0 bps
Output bytes : 0 0 bps
Input packets: 0 0 pps
Output packets: 0 0 pps
Queue counters: Queued packets Transmitted packets Dropped packets
0 best-effort 0 0 0
1 expedited-fo 0 0 0
2 assured-forw 0 0 0
3 network-cont 0 0 0
Active alarms : None
Active defects : None
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What it Means
The output shows a summary of interface information. Verify the following
information:
- The physical interface is Enabled. If the interface is
shown as Disabled, do either of the following:
- In the CLI configuration editor, delete the disable statement
at the [edit interfaces interface-name] level
of the configuration hierarchy.
- In the J-Web configuration editor, clear the Disable check
box on the Interfaces>interface-name page.
- The physical link is Up. A link state of Down indicates
a problem with the interface module, interface port, or physical connection
(link-layer errors).
- The Last Flapped time is an expected value. The Last
Flapped time indicates the last time the physical interface became unavailable
and then available again. Unexpected flapping indicates likely link-layer
errors.
- The traffic statistics reflect expected input and output rates.
Verify that the number of inbound and outbound bytes and packets matches expected
throughput for the physical interface. To clear the statistics and see only
new changes, use the clear interfaces statistics interface-name command.
For more information about show interfaces detail, see the JUNOS Interfaces Command Reference.
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