Verify that an ISDN B-channel interface is operating properly. For ISDN PRI, verify that a B-channel interface is configured correctly. (To display a list of B-channel interfaces, enter the show isdn calls command.)
From the CLI, enter the show interfaces extensive command. Alternatively, from the J-Web interface select Monitor>Interfaces>bc-0/0/4:1.
user@host> show interfaces bc-0/0/4:1
extensive
Physical interface: bc-0/0/4:1, Administratively down, Physical link is Up
Interface index: 145, SNMP ifIndex: 75, Generation: 26
Type: Serial, Link-level type: Multilink-PPP, MTU: 1510, Clocking: Internal,
Speed: 64kbps,
Parent: br-0/0/4 Interface index 143
Device flags : Present Running
Interface flags: Admin-Test SNMP-Traps 16384
Link type : Full-Duplex
Link flags : None
Physical info : Unspecified
Hold-times : Up 0 ms, Down 0 ms
Current address: Unspecified, Hardware address: Unspecified
Alternate link address: Unspecified
CoS queues : 8 supported, 8 maximum usable queues
Last flapped : Never
Statistics last cleared: Never
Traffic statistics:
Input bytes : 5787 0 bps
Output bytes : 3816 0 bps
Input packets: 326 0 pps
Output packets: 264 0 pps
Input errors:
Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed discards: 6,
Resource errors: 0
Output errors:
Carrier transitions: 0, Errors: 0, Drops: 0, MTU errors: 0, Resource errors: 0
Queue counters Queued packets Transmitted Packets Dropped packets
0 best-effort 314335 0 0
1 best-effort 0 0 0
2 best-effort 5 0 0
3 best-effort 5624 5624 0
Packet Forwarding Engine configuration:
Destination slot: 5, PLP byte: 1 (0x00)
CoS transmit queue Bandwidth Buffer Priority Limit
% bps % usec
0 best-effort 95 60800 95 0 low none
3 network-control 5 3200 5 0 low none
Logical interface bc-0/0/4:1.0 (Index 71) (SNMP ifIndex 61) (Generation 33)
Flags: Device Down Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol mlppp, Multilink bundle: dl0.0, MTU: 1506, Generation: 18, Route table: 0
The output shows a summary of B-channel interface information. Verify the following information: