| Information to Monitor | Command | Example |
| General interface information | show interfaces | user@host> show interfaces fe-5/0/0 Physical interface: fe-5/0/0, Enabled, Physical link is Up Interface index: 37, SNMP ifIndex: 14 Link-level type: Ethernet, MTU: 1514, Source filtering: Disabled Speed: 100mbps Loopback: Disabled, Flow control: Enabled, Ingress Rate Limit: 20mbs Device flags : Present Running Interface flags: SNMP-Traps Link flags : None Current address: 00:90:69:0c:0e:76, Hardware address: 00:90:69:0c:0e:76 Input rate : 0 bps (0 pps), Output rate: 0 bps (0 pps) Active alarms : None Active defects : None Logical interface fe-5/0/0.0 (Index 511) (SNMP ifIndex 15) Flags: SNMP-Traps, Encapsulation: ENET2 Protocol inet, MTU: 1500 Addresses, Flags: Is-Preferred Is-Primary Destination: 29.0.1/24, Local: 29.0.1.1, Broadcast: 29.0.1.255 |
| Summary interface information | show interfaces terse | user@host> show interfaces ml-1/0/0 terse Interface Admin Link Proto Local Remote ml-1/0/0 up up ml-1/0/0.1 up up inet 10.20.30.40 --> 10.20.30.50 ml-1/0/0.2 up up inet 10.0.0.2 --> 10.0.0.1 iso mpls ml-1/0/0.10 up up inet 128.1.1.3 --> 128.1.1.2 iso |
| Configured interface descriptions | show interfaces descriptions | user@host> show interfaces descriptions Interface Admin Link Description so-3/2/0 up up interface-1 so-3/2/0.0 up up interface-2 so-3/2/1 up up interface-3 so-3/2/2.0 up up interface-4 |
| Routing information for each interface | show interfaces routing | user@host> show interfaces routing brief Interface State Addresses so-5/0/3.0 Down ISO enabled so-5/0/2.0 Up MPLS enabled ISO enabled INET 192.168.2.120 INET enabled ... |
| Media-specific interface information | show interfaces media | user@host> show interfaces media at-5/1/0 Physical interface: at-5/1/0, Enabled, Physical link is Up Interface index: 21, SNMP ifIndex: 9 Link-level type: ATM-PVC, MTU: 4482, Clocking: Internal, SONET mode Speed: OC12, Loopback: None, Payload scrambler: Enabled Device flags : Present Running Link flags : None OAM F5 cell statistics: Output: Loop 797, RDI 0 Input: Loop 797, RDI 0, AIS 0 Input rate : 448 bps (1 pps), Output rate: 432 bps (1 pps) Active alarms : None Active defects : None SONET errors: BIP-B1: 10, BIP-B2: 140, REI-L: 380, BIP-B3: 31, REI-P: 220 |
| Interface statistics | show interfaces statistics | user@host> show interfaces e1-1/1/0 statistics Physical interface: e1-1/1/0, Enabled, Physical link is Up Interface index: 30, SNMP ifIndex: 130 Link-level type: PPP, MTU: 4474, Clocking: Internal Speed: E1, Loopback: None, FCS: 16, Framing: G704 Device flags : Present Running Interface flags: Point-To-Point SNMP-Traps Link flags : Keepalives Statistics last cleared: Never Input rate : 0 bps (0 pps), Output rate: 0 bps (0 pps) Input errors : 0, Output errors : 0 Active alarms : None Active defects : None |
| Zero interface statistics | clear interfaces statistics | user@host> clear interfaces statistics all user@host> |
| Filters or policers installed | show interfaces (filters policers) | user@host> show interfaces policers so-2/1/0 Interface Admin Link Proto Input Policer Output Policer so-2/1/0 up down so-2/1/0.0 up down inet so-2/1/0.0-in-policer so-2/1/ 0.0-out-policer iso inet6 |
| Interface statistics | monitor interface | user@host> monitor interface so-0/0/0 router1 Seconds: 19 Time: 15:46:29 Interface: so-0/0/0, Enabled, Link is Up Encapsulation: PPP, Keepalives, Speed: OC48 Traffic statistics: ... Encapsulation statistics: ... Error statistics: ... Active alarms : None Active defects: None SONET error counts/seconds: ... SONET statistics: ... Received SONET overhead: ... Transmitted SONET overhead: ... Next='n', Quit='q' or ESC, Freeze='f', Thaw='t', Clear='c', Interface='i' |
| Perform a tcpdump | monitor traffic | user@host> monitor traffic interface fxp0 listening on fxp0.0 18:17:28.800650 In server.home.net.723 > host1 0.lab.home.net.log 18:17:28.800733 Out host2-0.lab.home.net.login > server.home.net.7 18:17:28.817813 In host30.lab.home.net.syslog > host40.home0 18:17:28.817846 In host30.lab.home.net.syslog > host40.home0 18:17:28.819174 In host30.lab.home.net.syslog > host40.home0 ... |
| Automatic Protection Switching information | show aps | user@host> show aps Interface Group Circuit Intf State t3-1/2/0:0 king Working enabled, up t3-1/3/0:0 king Protect disabled, up |
| Start bit error rate test | test interface bert-start | user@host> test interface t3-5/2/0 bert-start user@host> show interfaces t3-5/2/0 extensive ... DSU configuration: Compatibility mode: None, Scrambling: Disabled, Subrate: Disabled FEAC loopback: Inactive, Response: Disabled, Count: 0 BERT time period: 10 seconds, Elapsed: 10 seconds (completed) Algorithm: 2^3 - 1, Pseudorandom (1), Error rate: 10e-0 Bit count : 5656, Overflows: 0 Error bit count: 811, Overflows: 0 LOS status: OK, LOS count: 1, LOS seconds: 9 ... |
| Stop bit error rate test | test interface bert-stop | user@host> test interface t3-5/2/0 bert-stop |
| Transmit over FDL to initiate or terminate a far-end line loopback | test interface feac-loop-initiate | user@host> test interface t3-5/2/0 fdl-line-loop ansi |
| Transmit over FDL to initiate or terminate a far-end payload loopback | test interface fdl-payload-loop | user@host> test interface t3-5/2/0 fdl-payload-loop ansi |
| Transmit the line loopback activate code word sequence on the interface's FEAC channel | test interface feac-loop-initiate | user@host> test interface t3-5/2/0 feac-loop-initiate |
| Transmit the line loopback deactivate code word sequence on the interface's FEAC channel | test interface feac-loop-terminate | user@host> test interface t3-5/2/0 feac-loop-terminate |
| VRRP groups | show vrrp | user@backup-router> show vrrp brief Interface Unit Group Type Address Int state VR state Timer ge-5/2/0 0 10 lcl 192.168.29.10 up backup D 7.133 vip 192.168.29.55 mas 192.168.29.254 |
| Zero VRRP group statistics | clear vrrp | user@backup-router> clear vrrp statistics all |
| ILMI messages | show ilmi | user@host> show ilmi all Physical interface: at-6/2/1, VCI: 0.16 Peer IP address: 192.168.4.24, Peer interface name: 1C4 Physical interface: at-6/3/0, VCI: 0.16 Peer IP address: 192.168.7.6, Peer interface name: 2C3 Physical interface: at-6/4/0, VCI: 0.16 Peer IP address: 192.168.9.10, Peer interface name: 1C2 |
| ILMI statistics | show ilmi statistics | user@host> show ilmi statistics ILMI statistics: Input: Packets: 0, Bad versions: 0, Bad community names: 0, Bad community uses: 0, ASN parse errors: 0, Too bigs: 0, No such names: 0, Bad values: 0, Read onlys: 0, General errors: 0, Total request varbinds: 0, Total set varbinds: 0, Get requests: 0, Get nexts: 0, Set requests: 0, Get responses: 0, Traps: 0, Silent drops: 0, Proxy drops 0 Output: Packets: 0, Too bigs: 0, No such names: 0, Bad values: 0, General errors: 0, Get requests: 0, Get nexts: 0, Set requests: 0, Get responses: 0, Traps: 0 |
| Zero ILMI statistics | clear ilmi statistics | user@host> clear ilmi statistics |