14. Interface logical unit (3/5)
* layer2 parameters are being configured under the physical level.
* PPP encapsulation support one sub-interface in IOS, and unit 0 only in JUNOS
22. Fast Interface Configuration (2/2)
To change the duplex (ex: full)and speed(ex:100m), under fast interface
configuration level, you type;
set speed 100m
set link-mode full-duplex
23. Gigabit Ethernet Configuration (1/2)
• You can edit physical parameters under
(ether-options or gigether-option)configuration level.
• ether-option or gigether-option are being depended
on the switch catalyst.
set ether-options speed 100m
set ether-options link-mode full-duplex
set ether-options auto-negotiation
26. VLAN configuration(2/4)
Example of editing vlan configuration
{master:0}[edit interfaces]
User @ switch # edit ge-0/0/19
{master:0}[edit interfaces ge-0/0/19]
User @ switch # show
description ESP-Hiltion-Ramsis-INT-30622-6;
{master:0}[edit interfaces ge-0/0/19]
User @ switch # set vlan-tagging
{master:0}[edit interfaces ge-0/0/19]
User @ switch # set unit 10 vlan-id 100
{master:0}[edit interfaces ge-0/0/19]
User @ switch # set unit 11 vlan-id 200
User @ switch # set unit 11 family inet address 2.2.2.2/30
{master:0}[edit interfaces ge-0/0/19]
User @ switch # show
description ESP-Hiltion-Ramsis-INT-30622-6;
vlan-tagging;
unit 10 {
vlan-id 100;
family inet {
address 1.1.1.1/30;
}
}
unit 11 {
vlan-id 200;
family inet {
address 2.2.2.2/30;
}
}
36. Loopback interfaces
• No new features have been introduced
• Same concept as Cisco ,Brocade,3com……etc
• Identifying the router-id
• Facilitate the router administrative
management.
• Always up up interface.
37. Scrambling
SONET payload scrambling preserves data integrity. Scrambling is designed to randomize the digital bits (pattern of 1s
and 0s) carried in the Asynchronous Transfer Mode (ATM) cells (physical layer frame). Randomizing the digital bits
can prevent continuous, long strings of all 1s or all 0s. Transitions between 1s and 0s are used by some physical
layer protocols to maintain clocking. SONET interfaces support two levels of scrambling, as follows:
1- SONET frame scrambling mode required by the International Telecommunications Union Telecommunication
Standardization (ITU-T) GR-253 standard. This mode uses a 1 + x6 + x7 algorithm to scramble the section overhead
of the SONET frame. It does not scramble the first row of the section overhead.
2- Cell payload scrambling is optional and is defined in ITU-T I.432, section 4.5.3. This mode randomizes the bits in the
payload portion of an ATM cell to make sure that the beginning of each new cell is recognized. It leaves the 5-byte
header unscrambled.
Synchronous Transport System (STS) stream scrambling must be enabled on every SONET device and is the default for
SONET interfaces.
Cell payload scrambling or SONET High-level Data Link Control (HDLC) scrambling can be enabled or disabled, and on
Juniper routers is enabled by default to provide better link stability. Both sides of a connection must either use
scrambling or not use it.
edit interfaces so-fpc/pic/port sonet-options
set payload-scrambler
show
commit
38. Frame check sum
• Used for error detection.
• T1, E1, T3, E3, SONET and most interfaces are using 16bit
FCS(the same as Cisco).
• You can force it to operate on 32-bit.
39. L2 Encapsulation(1/5)
• The default is PPP
• You can change the encapsulation under
encapsulation configuration level
set encapsulation <>
40. L2 Encapsulation(2/5)
• Let’s remember that Cisco in HDLC support
only one interface and configured under the
physical interface (no sub-interfaces);
46. Frame relay encapsulation(3/7)
• To configure point to multi-point two steps are being required;
1- configure the interface to multi-point
2- define the DLCI mapping
lab@HongKong # set unit 0 multipoint
53. Monitoring interfaces (2/8)
User@router > show interfaces descriptions
Interface Admin Link Description
ge-0/1/0 up up HODDRS-D02H-SUZ-EG L1 GIG
ge-0/1/0.26 up up IPSLA-HODDRS-Probe-ADSL
ge-0/1/0.100 up up HODDRS-D02H-SUZ-EG MNGT
ge-0/1/0.111 up up HODDRS-D02H-SUZ-EG GLBL
ge-0/1/0.950 up up IPSLA-HODDRS-Probe-Internet
User@router > show interfaces terse
Interface Admin Link Proto Local Remote
pfh-0/0/0 up up
pfh-0/0/0.16383 up up inet
ge-0/1/0 up up
ge-0/1/0.26 up up vpls
ge-0/1/0.100 up up inet 172.16.75.57/29
multiservice
ge-0/1/0.111 up up vpls
ge-0/1/0.950 up up inet 41.33.254.177/30