The E1 port configuration
in the Cisco 2900, 4500, 4700, 7000 and 7500 series all support E1 (2.048Mbps) interface. Each E1 port can be divided into 30 64K data lines and 2 signal lines according to the time slot. These 30 Each 64K data line can be used as a 64K dedicated line.
After the router is newly installed with the E1 board, you need to configure it before you can see the board information in show run, otherwise you will not see the newly installed board and interface
configuration commands:
Conf t
card type e1 0 0: board slot number
controller E1 0/0/0
channel-group 0 unframed-unframed mode
controller E1 0/0/1
channel-group 0 timeslots 1-31--framing mode
Then configure the IP address under the port and show run will display
interface Serial0/0/0:0
ip address 192.168.10.2 255.255.255.252
!
Interface Serial0/0/1:0
no ip address
Precautions for business debugging:
1. After the installation of the telecommunications external line is completed, a loop test must be performed to ensure that the line between the cabinet and the telecommunications room end is normal without packet loss.
2. The E1 board is installed and configured. The board does not light up before the configuration is completed. of
3, an end note to the bureau Optical data is to Ching mode or unframed mode, a non-framed mode with existing room.
Configuration commands:
1. In the configuration mode, define Controller E1
controller e1 slot/port slot/port ---- distinguish the slot number and port number.
2. Define line code
linecode {ami |hdb3} linecode----The default is HDB3.
3. Define the character frame
framing {crc4 |no-crc4} framing----The default is crc4, which must match the telecom office parameters.
4. Define the E1 group
channel-group number timeslots range [speed {48| 56| 64}]--channel-group----each E1 can be divided into 30 channel-groups, and the channel-groups and time slots correspond to each other .channel-group is 0-30, timeslots is 1-.
5. Specify which channel-group the serial port belongs to
interface serial slot/port:channel-group: interface serial----After defining the E1 channel-group, we assign the group to a virtual serial port.
Channelized E1 Interface Example
Configuration example:
1. Suppose it is a 7500 series router, and the E1 interface (MIP board) is on slot 4.
A channel-group can correspond to multiple time slots. In this example, serial4/0:1 has a data rate of
5 64Kbps . Specific The configuration process is as follows: Router#conf t Router(config)#controller e1 4/0 Router(config-controller)# Router(config-controller)#framing NO-CRC4 Router(config-controller)#channel-group 0 timeslots 1 ( 1 slot configured to channel-group 0, i.e., channel-group 0 contains slots 1, its band width is on 64K) Router (config-Controller) Channel-Group # 1 timeslots 2,7-9,20 time (configuration Slots 2, 7, 8, 9, 20 are channel-group 1, and its bandwidth is 64 5=512K,
where 7-9 refers to a segment, you can use the same command to configure multiple channel-groups, but you need Note that
channel-group corresponds to different numbers, and a time slot cannot be included in multiple groups)
Router(config-controller)#exit
Router(config)#interface s4/0:0
Router(config-if)#ip address 16.217.30.2 255.255.255.252
Router(config-if)# encapsulation ppp
Router(config-if)#exit
Router(config)#interface Serial4/0:1
Router(config-if)# ip address 16.205.30.5 255.255.255.252
Router(config-if)# encapsulation ppp
(The above process basically completes the E1 configuration, now you only need to shut the corresponding port and save the configuration)
The following is the corresponding configuration display
for e1 after the configuration is completed :
Controller E1 0
framing NO-CRC4
channel-group 0 timeslots 1
channel-group 1 timeslots 2,7-9,20
!
Interface Serial4/0:0
ip address 16.217 .30.2 255.255.255.252
encapsulation ppp
!
Interface Serial4/0:1
ip address 16.205.30.5 255.255.255.252
encapsulation ppp
First of all, I want to talk about the basic concepts of E1 and CE1. The most original use of E1 is when it is used as a digital relay of a voice switch. It uses one E1 as 32 64K, but time slot 0 and time slot 15. It is used to transmit control signaling, so one E1 can transmit 30 channels of voice. This is the E1 that is said on the access server (such as Huawei 8010, Nortel’s CVX1800, etc.), and is somewhat different from the E1 concept usually said on routers. The E1 on the router cannot be divided into time slots and can only be used as a 2M line.
The bandwidth of the transmission line of CE1 is 2048K. The main difference between it and E1 is that E1 cannot divide time slots, while CE1 can divide time slots. Each time slot of CE1 is 64K, and there are 32 time slots in total. When in use, they can be divided into n*64K, such as 128K, 256K, and so on. Time slots 0 and 15 of CE1 are not used to transmit user data traffic, time slot 0 is to transmit the synchronization number, and time slot 15 to transmit control signaling, so that only 30 time slots can actually be used, so when the CE1 division is specifically configured When there is a gap, pay attention. CE1 and E1 can also be interconnected, but CE1 must be used as E1, that is, time slots cannot be used. Because CE1 is more flexible, we can often encounter CE1.
In the process of router configuration E1 and CE1, we often use the show controller e1 command when we encounter line problems. The following is a detailed explanation of show controller e1. I hope it will be of some help to you. In the description of the show controller e1 command, attach the flow chart of cisco to solve E1 and CE1 failures!
Note the problem: On the routers at both ends of the CE1 configuration, the following parameters must be consistent. They are: time slot, framing, linecode, CRC, etc., and also pay attention to keeping the clock synchronized.
E1 status query command
show controller e1 command function
? View the status of E1 link. If you specify the slot and port (for example: show controller e1 5/6), the link status will be displayed every 15 minutes.
? Can display information used to troubleshoot the physical layer and data link layer
? Local and remote alarm information
parameter description of command output
First look at the command output of show controller e1, the following is the output of two different routers:
7026 #show controller e1
E1 5/1 is up.
Applique type is Channelized E1-balanced
No alarms detected.
Framing is NO-CRC4, Line Code is HDB3, Clock Source is Line.
International Bit: 1, National Bits: 11111
Data in current interval (648 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
parameter explanation: The
field description
E1 5/1 is up
shows that E1 controller 5/1 is running. E1 controller may be in these three situations: up, down, administratively down. In addition, if a ring is formed, it can be divided into a local ring and a remote ring.
Applique Type
indicates whether E1 is balanced or unbalanced, balanced impedance is 120 ohms, unbalanced is 75 ohm
Framing
current frame type, the default is CRC4, and NO-CRC4.
The
current line code of Line Code , the default is: HDB3. There is also ami.
No alarms detected
warning display. Possible warnings are: the
transmitter sends a remote alarm the
transmitter is sending a high alarm indication message.
The receiver has a signal loss and the
receiver gets AIS.
The receiver has lost frames.
The receiver has a remote alarm the
receiver has no alarm
rrent interval
(251 seconds elapsed)
displays the current cumulative time, refreshed every 15 minutes.
Line Code Violations
indicates a Bipolar Violation (BPV) or Excessive Zeros (EXZ) error event.
Path Code Violations
indicates that there is a frame synchronization error bit in the D4 and E1-no CRC format, or a CRC error in the Extended Superframe (ESF) and E1-CRC format.
Slip secs
indicates the duplication and deletion of the payload bits of the DS1 frame. When the routers at the sending and receiving ends of the connection are inconsistent, Slip secs
Fr loss secs will appear
as the accumulation time of a lost frame.
Line Err secs The time
when one or more Line Code Violation errors are found to accumulate.
Degraded mins.
A degraded minute is the time when the estimated error rate is between 1E-6 and 1E-3.
Errored secs are
between ESF and E1 CRC link, it refers to the time when one of the following errors is detected:
One or more Path Code Violations.
One or more Controlled Slip events.
For SF and E1 no-CRC links, the time that Bipolar Violations exist.
Bursty Err secs are
more than one but less than 320 Path Coding Violation errors, not Severely Errored Frame found and no incoming AIS. Controlled slips are not included in this parameter.
Severly Err secs
to ESF signal, it refers to the time when one of the following errors is detected:
320 or more Path Code Violation errors It is
found that one or more frames are lost.
An AIS found.
For the E1-CRC signal, it refers to the time when one of the following errors is detected:
832 or more Path Code Violation errors
One or more frame loss is found.
For the E1-nonCRC signal, this is the time
for 2048 Line Code Violations or more to exist. For the D4 signal, it is the time when Framing Errors, or frame loss, or 1544 Line Code Violations are not used in the
Unavail Secs
interface. Time, in seconds.