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Any Questions?. Interfaces Physical –The actual media connections –Fixed, transient, etc Logical –Additional settings associated to the physical ports.

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Presentation on theme: "Any Questions?. Interfaces Physical –The actual media connections –Fixed, transient, etc Logical –Additional settings associated to the physical ports."— Presentation transcript:

1 Any Questions?

2 Interfaces Physical –The actual media connections –Fixed, transient, etc Logical –Additional settings associated to the physical ports Pg 30

3 Interfaces JUNIPER and interfaces –Types –Naming –Properties How to configure –T1 –Ethernet –Serial –Others Pg 30

4 Interfaces Interface Types –Permanent Cannot be removed Fixed, physical and built in logical interfaces –Transient Can be modified Pg 30

5 Permanent Interfaces Always present –Management –Software pseudo-interface (tunnels) –Fixed port LAN/WAN Pg 30

6 M/T series Permanent Interfaces Fxp0 interface –Out of Ban management Ethernet –Connected to Routing Engine (control Plane) –Non-Transit Traffic cannot enter here and go out LAN/WAN Beware of routing to fxp0 Fxp1 –Internal interface between Routing Engine (RE) and Packet Forwarding Engine (PFE) Not configured, but helpful for troubleshooting Pg 31

7 Permanent Psuedointerfaces Not physical, used by router logic lo0 –This is a loopback interface that ties to the router itself and not to any one physical interface. This is often assigned an address to provide a stable address for management traffic and routing protocols, which allows your router to adapt to network and physical interface failures. Also, when configured with firewall filters, this interface serves to protect the RE from attacks destined to the router. sp –This service interface is used when configuring features such as Network Address Translation (NAT), IPSec, and stateful firewalls. pd –This Physical Interface Module (PIM) de-encapsulation interface allows a multicast rendezvous point (RP) to process PIM register messages. Pg 31

8 Permanent Psuedointerfaces pe –This PIM encapsulation interface is used in multicast to create a unicast PIM register message to send to the RP. ip –This is an IP-over-IP encapsulation interface to create IP-in-IP tunnels. dsc –This is a discard interface, which can be used to silently discard packets. This is often used to create a choke point for denial of service (DoS) attacks. tap –This is a virtual Ethernet interface historically used for monitoring on FreeBSD systems. This interface could be used to monitor discarded packets on a router but is no longer officially supported. Pg 31

9 Transient Interfaces Interfaces that can be moved, removed or replaced –Ports on M series routers, Phyical Interface Cards (PICs), J-Series Phyiscal Interface Modules (PIMs) Fast Ethernet T1 ATM SONET Service based from PIC –Tunnels –Multilink –etc Pg 32

10 Any Questions?

11 Interface Naming Naming is standardized Interface type and three numbers MM-F/P/T, where: –MM = media type – F = chassis slot number – P = PIC slot number – T = port number For example –Fe-0/2/1 Pg 32

12 Media Type ae –Aggregated Ethernet, a logical linkage of multiple Ethernet interfaces defined in the IEEE 802.3ad standard. at –ATM, which sends fixed 53-byte cells over the transport media. This interface could also be used for ATM over digital subscriber line (DSL) connections. br –Physical Integrated Services Digital Network (ISDN) interface. e1 –Standard digital communication standard over copper at a rate of 2.048 Mbps, used mostly in Europe. e3 –Standard digital communication standard over copper at a rate of 34.368 Mbps, used mostly in Europe. t1 –Basic physical layer standard used by the digital signal level 1 at a rate of 1.544 Mbps, used extensively in North America. Pg 32

13 Media Type t3 –Basic physical layer standard used by the digital signal level 3 at a rate of 44.736 Mbps, used extensively in North America. fe –100 Mbps standard initially created by Xerox in the 1970s for connecting multiple computers together; referred to as a LAN today. ge –Higher-speed Ethernet standard at 1 Gbps or 10 Gbps. se –Interface used for serial communications (one bit at a time). Serial interfaces include standards such as EIA 530, V.35, and X.21. ct1 –T1 interface that is channelized by splitting the interface into 24 DSO channels. Pg 33

14 Slot Number MM-F/P/T, where: –Chassis Slot Number F Flexible PIC concentrator slot on M/T –Can be horizontal or vertical –Vertical count left to right –Horizontal count top to bottom Pg 33

15 Slot Number Chassis Slot Number F –PIM Slot on J series Fixed port are slot 0 PIM slots are 1-6 from top to bottom and left to right Pg 33

16 PIC Slot MM-F/P/T, where: P PIC Slot number M-Series –4 PICs can fit a single FPC slot Verticals are top to bottom Horizontal varies J-Series –No PIC slot numbers –Set to 0 Pg 34

17 Port Number MM-F/P/T, where: T is port number Actual physical port on the PIC –Numbering varies-horizontal or vertical Pg 36 Horizontal Vertical

18 Port Number MM-F/P/T, where: T is port number J Series is easier –Always left to right Pg 36

19 Interface Examples MM-F/P/T, where: se-1/0/0 –Serial interface in FPC slot 1, PIC slot 0, and port 0 fe-0/2/1 –Fast Ethernet interface in FPC slot 0, PIC slot 2, and port 2 t1-1/0/1 –T1 interface in FPC slot 1, PIC slot 0, and port Pg 38

20 Any Questions?

21 Logical Unit and Channel Number Logical Unit –Subdividing the physical interface into logical units Subinterface OR channel –Designated by a. Number is arbitrary –Fe-0/0/0.0 »Logical unit 0 –E3-1/0/2.12 »Logical unit 12 Pg 38

22 Logical Unit and Channel Number Channel Number –For specifying specific channels –Noted by a colon : –T1 for example Ct-1/1/2:14 –Channel 14 on a channelized T1 Pg 38

23 Interface Properties Physical Prosperities –Tied to entire physical port Logical Properties –Only for channel or unit number Pg 38

24 Physical Properties Clocking –This aligns the bits as they are transmitted out of the interface. The clocking can be learned either from an external source or from the router itself. Encapsulation –This is the Layer 2 encapsulation that is going to be used on the interface. Examples include Frame Relay, Point-to-Point Protocol (PPP), and Cisco High- Level Data Link Control (HDLC). MTU –This is the maximum transmission unit, which is the maximum size of the frame transmitted from the interface. Keepalives –These are mechanisms used to verify the operation of the interface. Most encapsulations have keepalives enabled by default, but you can disable them to aid in troubleshooting. Layer 1/2 options –These are various bit and byte settings for the interface media. For a T1 interface, this includes byte encodings, framing, frame check sequences (FCSs), and line buildouts. In comparison, a Fast Ethernet interface might have options such as flow control, loopbacks, and source address filters. Pg 39

25 Physical Properties Physical Properties should be configured before logical identifiers se-0/0/2 { no-keepalives; encapsulation cisco-hdlc; serial-options { clocking-mode internal; } unit 0; } Pg 39

26 Logical Properties All router interfaces that will send and receive transit traffic require a logical unit Logical units create sub interfaces –For Exampl-VLANs for ethernet All Logical properties must be configured on a logical unit number –Different from Cisco Pg 39

27 Common Logical Properties Protocol family –Indicates which Layer 3 protocols can be sent and received on the interface. The router can have one protocol family per logical unit or multiple families per logical unit configured. The most common family configured is family inet, which enables the sending and receiving of all packets in the Transmission Control Protocol/Internet Protocol (TCP/IP) suite (e.g., TCP, User Datagram Protocol [UDP], Internet Control Message Protocol [ICMP], and IP). Other common families are inet6 (IPv6), Multiprotocol Label Switching (MPLS), and ISO (ISIS packets). Protocol address –The Layer 3 family address, such as a family inet IP address. Virtual circuit address –Circuit identifier used when dividing the physical interface into multiple logical interfaces. These could be the VLAN ID, Frame Relay data-link connection identifiers (DLCIs), or ATM virtual path/Virtual Channel Identifier (VP/VCIs). Pg 40

28 Common Logical Properties Logical Unit number can be anything from 0-16, 385 Best practice is to use a logical number that matches circuit information –Match vlan number –Match dlci However, for point to point circuit or non- VLAN ethernet, use logical number 0 Pg 40

29 Common Logical Properties Example t1-0/0/2 { unit 0 { family inet { address 66. 32. 3. 2/30; } How would we create this config in the CLI??? Pg 40

30 Any Questions?

31 Interface Config Examples Basic Examples –FYI-References to Porter should be to ALE Lager to Ale config root@Lager> show interfaces terse fe-2/0/1 Interface Admin Link Proto Local Remote fe-2/0/1 up up [ edit] root@Lager# edit interfaces fe-2/0/1 [ edit interfaces fe-2/0/1] root@Lager# set unit 0 family inet address 10. 10. 20. 122/24 Pg 40

32 Interface Config Examples CLI-show the details [ edit interfaces fe-2/0/1] root@Lager# show unit 0 { family inet { address 10. 10. 20. 122/24; } Commit changes [ edit interfaces fe-2/0/1] root@Lager# commit and-quit commit complete Exiting configuration mode Pg 42

33 Interface Config Examples See changes root@Lager> show interfaces terse fe-2/0/1 Interface Admin Link Proto Local Remote fe-2/0/1 up up fe-2/0/1. 0 up up inet 10. 10. 20. 122/24 Test Connectivity root@Lager> ping 10. 10. 20. 121 PING 10. 10. 20. 121 (10. 10. 20. 121) : 56 data bytes 64 bytes from 10. 10. 20. 121: icmp_seq=0 ttl=64 time=7. 758 ms 64 bytes from 10. 10. 20. 121: icmp_seq=1 ttl=64 time=10. 394 ms ^C Pg 42

34 Any Questions?

35 Interface Config Examples See changes root@Lager> show interfaces terse fe-2/0/1 Interface Admin Link Proto Local Remote fe-2/0/1 up up fe-2/0/1. 0 up up inet 10. 10. 20. 122/24 Test Connectivity root@Lager> ping 10. 10. 20. 121 PING 10. 10. 20. 121 (10. 10. 20. 121) : 56 data bytes 64 bytes from 10. 10. 20. 121: icmp_seq=0 ttl=64 time=7. 758 ms 64 bytes from 10. 10. 20. 121: icmp_seq=1 ttl=64 time=10. 394 ms ^C Pg 42

36 Fast Ethernet with VLAN VLAN between Lager and ALE –Enable vlan on lager Interface property root@Lager> configure [ edit] root@Lager# edit interfaces fe-2/0/1 [ edit interfaces fe-2/0/1] root@Lager# set vlan-tagging [ edit interfaces fe-2/0/1] root@Lager# set unit 0 vlan-id 100 Pg 43

37 Fast Ethernet with VLAN [ edit interfaces fe-2/0/1] root@Lager# show vlan-tagging; unit 0 { vlan-id 100; family inet { address 10. 10. 20. 122/24; } Pg 43

38 Fast Ethernet with VLAN Best practice is to have the logical unit match the vlan Change the vlan to 100 –Rename command [ edit interfaces fe-2/0/1]root@Lager# rename unit 0 to unit 100 [ edit interfaces fe-2/0/1] root@Lager# show vlan-tagging; unit 100 { vlan-id 100; family inet { address 10. 10. 20. 122/24; } Pg 43

39 T1 with Cisco HDLC Cisco default is HDLC –Cisco added a proprietary field t1-0/0/2 { encapsulation cisco-hdlc; unit 0 { family inet { address 10. 200. 8. 9/30; } Pg 43

40 Serial Interface with PPP V.35 is common in US DTE or DCE connections DCE provides the clocking –Usually a CSU/DSU With Lab setups, routers are often configured “back-to-back” –With a special crossover cable One side must provide the clocking Pg 44

41 Serial Interface with PPP root@ale# run show interfaces se-1/0/0 extensive | find "serial media" Serial media information: Line protocol: v. 35 Resync history: Sync loss count: 0 Data signal: Rx Clock: OK Control signals: Local mode: DCE To DTE: CTS: up, DCD: up, DSR: up From DTE: DTR: up, RTS: up DCE loopback override: Off Clocking mode: internal Clock rate: 8. 0 MHz Loopback: none Tx clock: non-invert Line encoding: nrz Pg 44

42 Serial Interface with PPP [ edit interfaces] root@ale# show se-1/0/0 serial-options { clocking-mode internal; } unit 0 { family inet { address 172. 16. 1. 1/30; } Pg 44

43 Serial Interface with PPP [ edit interfaces se-1/0/1] root@Bock#run show interfaces se-1/0/1 extensive | find "serial media" Serial media information: Line protocol: v. 35 Resync history: Sync loss count: 0 Data signal: Rx Clock: OK Control signals: Local mode: DTE To DCE: DTR: up, RTS: up From DCE: CTS: up, DCD: up, DSR: up Clocking mode: loop-timed Clock rate: 8. 0 MHz Loopback: none Tx clock: non-invert Line encoding: nrz Pg 44

44 Serial Interface with Frame Relay se-1/0/0 { encapsulation frame-relay; unit 645 { description "to R3"; dlci 645; family inet { address 172. 17. 24. 130/30; } Pg 47

45 Interface Troubleshooting Common Configuration issues –IP address configs Router Logical Units allow multiple IP addresses –Must be careful when you make changes –Issuing a second command creates a second address Delete first Address –Or rename details on original settings Pg 59

46 Interface Troubleshooting Original Settings [ edit interfaces fe-2/0/1] root@Lager# show vlan-tagging; unit 100 { vlan-id 100; family inet { address 10. 10. 20. 122/24; } If we need it to be /27 [ edit interfaces fe-2/0/1] root@Lager# set unit 100 family inet address 10. 10. 20. 122/27 Pg 59

47 Interface Troubleshooting Check details [ edit interfaces fe-2/0/1] root@Lager# show vlan-tagging; unit 100 { vlan-id 100; family inet { address 10. 10. 20. 122/24; address 10. 10. 20. 122/27; } Pg 59

48 Interface Troubleshooting Must remove the wrong address information Delete command [ edit interfaces fe-2/0/1] root@Lager# delete unit 100 family inet address 10. 10. 20. 122/24 Pg 59

49 Interface Troubleshooting Or, instead of adding and deleting [ edit interfaces fe-2/0/1] root@Lager# set unit 100 family inet address 10. 10. 20. 122/27 root@Lager# delete unit 100 family inet address 10. 10. 20. 122/24 Rename root@Lager# rename address 10. 10. 20. 122/24 to address 10. 10. 20. 122/27 Pg 59

50 Primary and Preferred addressing Juniper interfaces can have multiple addresses on a single logical unit Router needs to know how to choose the source IP for traffic –Each logical unit can only have one primary IP address but multiple preferred addresses If only one address, it is primary and preferred Pg 60

51 Primary and Preferred addressing Pg 60

52 Encapsulation Mismatch Both sides of a connection need the same layer encpsulation Point to Point Connections Frame Relay Ethernet –Watch out for one side with VLAN tagging and the other without –Must check the details of traffic Pg 61

53 Encapsulation Mismatch Monitor traffic –Allows you to watch the packets/frames –See the type of the frames being sent If you monitor on both sides, you will see the difference Pg 61

54 MTU and fragmentation Certain applications will send larger frames Interfaces have a limit to the size of the frame/packet they will send –Maximum Transmission Unit (MTU) You can find the MTU by using a ping with the size command and do not fragment –This will warn you if the packet needed to be fragmented. Pg 64

55 Looped interfaces You can set looping in two directions –Loopback local Point back towards you –Loopback remote Loops toward the network Pg 66


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