Technical Documentation

Example: Channelized E1 IQ Interface Configuration

Figure 1: Channelized E1 IQ Interface Example

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This example shows two ways to configure a channelized E1 IQ interface. Figure 1 shows a fractional E1 method and the NxDS0 method seen previously in the complex OC12 configuration example (see Example: Complex Configuration for a Channelized OC12 IQ Interface). The NxDS0 method breaks the channelized E1 IQ interface into discrete DS0 blocks, whereas the fractional method creates a clear channel E1 that is segmented by time slots.

To configure NxDS0 channels, include the partition statement at the [edit interfaces ce1-fpc /pic/port] hierarchy level. Include the timeslots and interface-type ds options to create the desired number of NxDS0 interfaces in time slots 2 through 32.

To configure a fractional E1 on a channelized E1 IQ interface, include the no-partition statement at the [edit interfaces ce1-fpc/pic/port] hierarchy level. After you commit this configuration, configure standard E1 options on the clear channel E1 interface. Include the timeslots statement at the [edit interfaces e1-fpc/pic/port e1-options] hierarchy level. Time slot 1 is reserved; use time slots 2 through 32.

Router A—NxDS0 Method

[edit]interfaces {ce1-1/2/3 {partition 1 timeslots 11 interface-type ds; # Creates NxDS0 channel ds-1/2/3:1.partition 2 timeslots 2-10 interface-type ds; # Creates a channel group with}                            # 9 NxDS0s.ds-1/2/3:1 {unit 0 {family inet {address 10.25.1.2/24;}}}ds-1/2/3:2 {unit 0 {family inet {address 10.25.2.2/24;}}}}

Router A—Fractional E1 Method

[edit]interfaces {ce1-1/2/6 {no-partition interface-type e1; # This creates a single E1 channel: e1-1/2/6.}e1-1/2/6 {e1-options {timeslots 2-3; # This statement enables only 2 of the 31 NxDS0 time slots}         # available on e1-1/2/6. You can use time slots 2 through 32.unit 0 {family inet {address 10.255.126.2/24;}}}}

Verifying Your Work

To verify correct operation of a channelized E1 IQ interface, use the following commands:

  • show interfaces
  • show interfaces controller
  • show interfaces interval (for E1 and channelized E1 channels)

To view the interface names of the physical channelized E1 IQ interface and the resulting interfaces configured on the channelized IQ interface, use the show interfaces controller command:


user@RouterA> show interfaces controller ce1-1/2/3
Controller                                                           Admin Link
ce1-1/2/3                                                             up    up
# This is the physical channelized E1 IQ interface.
     ds-1/2/3:1                                                        up    up
     ds-1/2/3:2                                                        up    up
# These are the resulting  N xDS0 interfaces.
user@RouterA>  show interfaces controller ce1-1/2/6
Controller                                                           Admin Link
ce1-1/2/6                                                            up    up
# This is the physical channelized E1 IQ interface.
e1-1/2/6                                                              up    up 
# This is the resulting E1 interface.

To view information about the physical channelized interface, include the ce1-fpc/pic/port option with the show interfaces command:


user@RouterA> show interfaces ce1-1/2/3
Physical interface: ce1-1/2/3, Enabled, Physical link is Up
  Interface index: 18, SNMP ifIndex: 1128
  Link-level type: Controller, MTU: 1504, Clocking: Internal, Speed: E1,
  Loopback: None, FCS: 16, Framing: G704, Parent: None
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link flags     : None
  Last flapped   : 2002-10-04 17:52:51 PDT (00:32:57 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)
  DS1   alarms   : None
  DS1   defects  : None
user@RouterA>  show interfaces ce1-1/2/6
Physical interface: ce1-1/2/6, Enabled, Physical link is Up
  Interface index: 25, SNMP ifIndex: 1134
  Link-level type: Controller, MTU: 1504, Clocking: Internal, Speed: E1, Loopback: None,
  FCS: 16, Framing: G704, Parent: None
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link flags     : None
  Last flapped   : 2002-10-04 17:52:51 PDT (00:34:49 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 0 bps (0 pps)
  DS1   alarms   : None
  DS1   defects  : None

To view information about an NxDS0 interface, include the ds-fpc/ pic/port:channel option with the show interfaces command:


user@RouterA> show interfaces ds-1/2/3:1 detail
Physical interface: ds-1/2/3:1, Enabled, Physical link is Up
  Interface index: 73, SNMP ifIndex: 1202, Generation: 325
  Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: 64kbps, Loopback: None,
  FCS: 16, Parent: ce1-1/2/3 (Index 18)
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link flags     : Keepalives
  Hold-times     : Up 0 ms, Down 0 ms
  Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
  Keepalive statistics:
    Input : 11 (last seen 00:00:02 ago)
    Output: 10 (last sent 00:00:06 ago)
  LCP state: Opened
  NCP state: inet: Opened, inet6: Opened, iso: Opened, mpls: Not-configured
  CHAP state: Not-configured
  Last flapped   : 2002-10-04 18:24:32 PDT (00:01:46 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                  559                   56 bps
   Output bytes  :                  656                   56 bps
   Input  packets:                   33                    0 pps
   Output packets:                   36                    0 pps
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort                   40                   40                    0
    1 expedited-fo                   0                    0                    0
    2 assured-forw                   0                    0                    0
    3 network-cont                   0                    0                    0
  Logical interface ds-1/2/3:1.0 (Index 36) (SNMP ifIndex 1266) (Generation 153)
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 1500, Generation: 352, Route table: 0
      Flags: None
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.25.1/24, Local: 10.25.1.2, Broadcast: Unspecified,
        Generation: 445
    Protocol iso, MTU: 1500, Generation: 353, Route table: 0
      Flags: Is-Primary
    Protocol inet6, MTU: 1500, Generation: 354, Route table: 0
      Flags: Is-Primary
      Addresses, Flags: Is-Preferred
        Destination: fe80::/64, Local: fe80::2a0:a5ff:fe3d:ac6, Broadcast: Unspecified,
        Generation: 446
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: feee::10:25:1:0/126, Local: feee::10:25:1:2,
        Broadcast: Unspecified, Generation: 448

To view information about the fractional E1 interface, include the e1-fpc/pic/port option with the show interfaces command:


user@RouterA> show interfaces e1-1/2/6 detail
Physical interface: e1-1/2/6, Enabled, Physical link is Up
  Interface index: 89, SNMP ifIndex: 1278, Generation: 341
  Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: E1, Loopback:None,
  FCS: 16, Framing: G704, Parent: ce1-1/2/6 (Index 25)
  Device flags   : Present Running
  Interface flags: Point-To-Point SNMP-Traps
  Link flags     : Keepalives
  Hold-times     : Up 0 ms, Down 0 ms
  Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
  Keepalive statistics:
    Input : 4 (last seen 00:00:05 ago)
    Output: 3 (last sent 00:00:09 ago)
  LCP state: Opened
  NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:
  Not-configured
  CHAP state: Not-configured
  Last flapped   : 2002-10-04 18:28:27 PDT (00:01:07 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :                  189                    0 bps
   Output bytes  :                  478                    0 bps
   Input  packets:                   13                    0 pps
   Output packets:                   28                    0 pps
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0 best-effort                   28                   28                    0
    1 expedited-fo                   0                    0                    0
    2 assured-forw                   0                    0                    0
    3 network-cont                   0                    0                    0
  DS1   alarms   : None
  DS1   defects  : None
  DS1 BERT configuration:
    BERT time period: 10 seconds, Elapsed: 0 seconds
    Induced Error rate: 10e-0, Algorithm: Unknown (0)
  Logical interface e1-1/2/6.0 (Index 52) (SNMP ifIndex 1279) (Generation 169)
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Bandwidth: 0
    Protocol inet, MTU: 1500, Generation: 401, Route table: 0
      Flags: None
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 10.255.126/24, Local: 10.255.126.2, Broadcast: Unspecified,
        Generation: 525

Published: 2010-04-15