Thanks alot man for your help...
this is a simple of show commands that can help us:
noc@MX960> show interfaces irb.161 terse
Interface Admin Link Proto Local Remote
irb.161 up down inet 172.17.161.254/24
multiservice
noc@MX960> show interfaces irb.161 terse Interface Admin Link Proto Local Remoteirb.161 up down inet 172.17.161.254/24 multiservice
noc@MX960> show interfaces irb.161 extensive
Logical interface irb.161 (Index 248) (SNMP ifIndex 747) (Generation 451)
Description: TO: default gateway NOC
Flags: Hardware-Down SNMP-Traps 0x4004000 Encapsulation: ENET2
Bandwidth: 1000mbps
Routing Instance: default-switch Bridging Domain: VLAN_161+161
Traffic statistics:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets: 0
Local statistics:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets: 0
Transit statistics:
Input bytes : 0 0 bps
Output bytes : 0 0 bps
Input packets: 0 0 pps
Output packets: 0 0 pps
Protocol inet, MTU: 1514, Generation: 553, Route table: 17
Flags: Sendbcast-pkt-to-re, Is-Primary
Addresses, Flags: Dest-route-down Is-Default Is-Preferred Is-Primary
Destination: 172.17.161/24, Local: 172.17.161.254, Broadcast: 172.17.161.255, Generation: 318
Protocol multiservice, MTU: 1514, Generation: 554, Route table: 17
Policer: Input: __default_arp_policer_