EPIU Training Material 0.2e

1 © NOKIA Ethernet Plug-In Unit .PPT / 08-12-2003 / AHi Company Confidential

v. 0.2.0e

08.12.2003

The information in this slide set is subject to change without notice by the EPIU-project. All rights reserved.

Technical features of the Ethernet Plug-In Unit (=EPIU)

with new FIU19E C2.0 indoor unit


Version history

• Version 0.1.0e:• First version used in CS training

• Version 0.2.0e:• Examples clarified: FB & Ethernet interface numbering added• List of things to remember added• EPIU chaining station configurations added• Bad network design examples added• Information about IP DCN added• Information about AUX plug in unit added


Contents• 1. Ethernet Plug-In Unit (=EPIU) technical overview 3

1.1 EPIU on single mode summary 51.2 EPIU on protected mode summary 61.3 Reading instructions 7

• 2. Unprotected radio hops2.1 EPIU in channel separation mode 92.2 EPIU in capacity sharing mode 102.3 EPIU full switch mode 112.4 Two radio hops with EPIU in channel separation mode and 3rd radio hop for E1 traffic 122.5 Two radio hops with EPIU in full switch mode 132.6 EPIU in chaining station configuration 14

• 3. Protected radio hop with 1*IU + 2*OU3.1 EPIU in channel separation mode 163.2 EPIU in capacity sharing mode 173.3 EPIU in full switch mode 18

• 4. Protected radio hop with 2*IU + 2*OU4.1 EPIU in channel separation mode 204.2 EPIU in capacity sharing mode 214.3 EPIU in full switch mode 22


New features of FIU 19E C2.0

1. Processor board:• Processor clock speed increment from 33.4 MHz to 50 MHz to

achieve better performance

2. Ethernet plug in unit support added:• New signals routed to plug in unit slot 2

3. IP DCN Improvements:• AUX FAST data channels can be used for IP DCN traffic (alternative

to HOP LAN data channel). Now IP DCN traffic capacity is 64-512 kbits/s depending of used radio links capacity.

• Hop LAN data channels can be alternatively used to be compatible with FIU 19E C1.5


1. Ethernet Plug-In Unit (=EPIU) technical overview 1/2

• Two 10/100 Base-T Ethernet interfaces (IEEE 802.3) on a single plug-in unit• Full & Half duplex Ethernet interface with auto-negotiation support• Ethernet flow control supported• Standard Ethernet frame support (1518 bytes)• Automatic MDI/MDIX crossover is supported• EPIU can learn up to 2048 MAC addresses

• Plug in unit provides transparent Ethernet bridging over radio hop • Max. packet length is 1536 bytes• Transparent to VLAN tagged Ethernet frames (1522 bytes)• Hop needs to be terminated at both ends of the radio hop with EPIU • EPIU supports up to two radios with Ethernet traffic • Radio path capacity 2-32 Mbit/s for Ethernet traffic, configurable (2Mbit/s granularity)• Remaining radio link capacity may be used for TDM traffic• No PPP support – Ethernet packet traffic is not embedded to E1 signals• Only FIU19E C2.0 supported, earlier FIU19E nor FIU19 can not be upgraded to

support EPIU• Packet buffer size is selectable towards radio link with following options: 32 kbytes, 64

kbytes, and 128 kbytes. In the other direction the buffer size is fixed to 64 kbytes for each port

• Link Loss Forwarding (LLF)


Ethernet Plug-In Unit technical overview 2/2

• There are three operating modes supported by the Ethernet Plug-In Unit

1) Channel separation mode- Ethernet interface 1 is connected to radio link 1 and Ethernet interface 2 is connected

to radio link 22) Full-switch mode

- Traffic from any of the device ports can be forwarded to any output port of the EPIU3) Capacity sharing mode

- It is possible to divide radio link’s Ethernet capacity between those two Ethernet ports to two individual bit pipes so that both of the interfaces have a fixed capacity of the radio link - Capacity can be shared quite freely between these two interfaces (granularity is 1/256 of links Ethernet capacity)

• Performance monitoring• Basic performance statistics via Q1 & Hopper Manager• SNMP statistics: RMON, IF MIB

• Configuration management:• Basic configuration management via Nokia Q1 & Hopper Manager• SNMP configuration management supported for EPIU

• Operation temperature adheres to FIU19E requirements.

• Possibility for remote SW update on the field for EPIU

• EPIU can be used in combination with any 4x2Mbit/s plug in units, also with EXU


1.1 EPIU on single mode summary

Channel separation

Eth-1

Eth-2

FB-1

FB-2

X

Full Switch

Eth-1

Eth-2

FB-1

FB-2

Capacity sharing over FB1

Eth-1

Eth-2

FB-1

FB-2


Eth-1

Eth-2

FB-1

FB-2

Unprotected radio hop• Channel separation mode

• Provides two independent channels; one channel over one radio hop

• Capacity sharing mode• Allows two independent Ethernet channels over single radio hop• Flexible sharing of radio paths capacity between two Ethernet channels (granularity 1/256 of links capacity)• It is only possible to transfer shared traffic over one Flexbus at a time

• Full Switch mode• Provides access to two radio hops via single Ethernet interface• Allows building chaining station configuration for Ethernet traffic without external cable

• Simultaneous transfer of E1 traffic• Configurable on 2Mbit/s granularity


1.2 EPIU on 1IU+2OU Protected mode etc.

• NOTE! Active change over from faulty EPIU on 2*IU mode coming later 1H/2004 with SW upgrade

• In protected modes FB2 is always protecting the traffic on FB1

• Optional FB3 can be used to transfer the Ethernet traffic

• Install FlexBus Plug-In Unit to slot 3•FB3 is unprotected

• EPIU supports both 2*IU and 2*OU protected modes

Channel separation

Eth-1

Eth-2

FB-1 (& FB-2)

FB-3

X

Full Switch

Eth-1

Eth-2

FB-1 (& FB-2)

FB-3


Eth-1

Eth-2

FB-1 (& FB-2)

FB-3


Eth-1

Eth-2

FB-1 (& FB-2)

FB-3

Protected radio hop (1 IU +2*OU)


1.3 Reading instructions

• One Ethernet channel over radio hop + simultaneous E1 traffic

• EPIU in full switch or separated channels mode

• Two separate Ethernet channels over single hop + simultaneous E1 traffic

• EPIU in capacity sharing mode

• E1 traffic over radio hop, no Ethernet traffic

• Protecting/Inactive (slave) radio hop: red color, dashed line

• Local Area Network (LAN) region 1-N. LAN cloud is supposed to consist of switches, routers or single host PC.

• Traditional PDH network for E1 traffic

PDH

PDH

LAN 1

LAN 1


2. Unprotected radio hops


PDH PDH

PDH PDH

2.1 Single hop with EPIU in channel separation mode

OUIU IUOU

Ethernet cable (LAN 1), 10/100 Base-TX EthernetEthernet cable (LAN 2), 10/100 Base-TX EthernetFlexbus cable between IU and OUOptional Ethernet cable (LAN 1/2)

LAN 2 LAN 2 LAN

1 LAN 1

Channel separation mode

nxE1nxE1

Eth-1 Eth-1

FB1FB1


2.2 Single hop with EPIU in capacity sharing mode

OUIU IUOU


LAN 4 LAN 4

LAN 3 LAN 3

LAN 2 LAN 2

LAN 1 LAN 1

Capacity sharing mode

OU OU

OU Optional 2.nd radio for PDH

Eth-1

Eth-2

Eth-1

Eth-2

FB1

FB1


2.3 Single hop with EPIU in full switch mode

OUIU IUOU


LAN 3 LAN 3

LAN 2 LAN 2

LAN 1 LAN 1

X

X Full switch mode


FB1 FB1

Eth-1Eth-2

Eth-1


PDH PDH

2.4 Two radio hops with EPIU in channel separation mode and 3rd radio hop for

E1 traffic

OU

IU

IU

OU

OU OU

IU


LAN 4 LAN 4

LAN 3 LAN 3

LAN 2 LAN 2

LAN 1 LAN 1


OU OU

nxE1

PDH PDH nxE1

OUOptional 3.rd radio with FlexBusPlug-In unit and external powersupply

PDH PDH

nxE1Eth-1

Eth-2

Eth-1

Eth-1

FB3

FB1

FB2

FB1

FB2

FB1


2.5 Two radio hops with EPIU in full switch mode

OU

IU

IUOU

OU OU

IU


LAN 2 LAN 2

LAN 1 LAN 1

LAN 3 LAN 3

LAN 4 LAN 4

X

X Full switch mode


Eth-1Eth-2

Eth-1

Eth-1

FB1

FB2 FB1

FB1


2.6 EPIU in chaining station configuration

OUIUOU IUOUOUIU


X Full switch mode


EPIU is needed also on chainingStation. Channel separation mode should be used

FB2 FB1 FB2 FB1

Eth-2Eth-1

Eth-1Eth-2


3. Two OU protected radio hops


3.1 EPIU in channel separation mode

OUIU IUOU

OU OU


Active radio hop

Inactive (protecting) radio hop

LAN 1 LAN 1

LAN 2 LAN 2


Eth-1 Eth-1

FB2

FB1

FB2

FB1


3.2 EPIU in capacity sharing mode

OUIU IUOU

OU OU


Active radio hop


LAN 2 LAN 2

LAN 1 LAN 1

LAN 4 LAN 4

LAN 3 LAN 3


Eth-1

FB2

FB1

Eth-1

FB2

FB1

Eth-2 Eth-2


3.3 EPIU in full switch mode

OUIU IUOU

OU OU


Active radio hop


LAN 3 LAN 3

LAN 2 LAN 2

LAN 1 LAN 1

X

X Full switch mode


Eth-1

FB2

FB1

Eth-1

FB2

FB1

Eth-2


4. Two IU protected radio hops

NOTE!

• On FIU19E C2.0 release it is possible to use EPIU on 2*IU configurations

• To connect Ethernet cables from 2*IU master/slave units a ”switch”-functionality

from the LAN is required for the proper LAN connectivity

• Faulty EPIU does NOT cause change over between indoor units

• The change over happens when E1 traffic is not complete on active indoor unit

• Change over between OUs is supported for PDH and Ethernet traffic

• On FIU19E C2.x SW release the active change over from EPIU will be supported


4.1 EPIU in channel separation mode

OUIU IUOU

OU OU

IUIU


Active radio hop


LAN 1 LAN 1

LAN 2 LAN 2


FB1

FB1

FB1

FB1

Eth-1

Eth-1

Eth-1

Eth-1


4.2 EPIU in capacity sharing mode

OUIU IUOU

OU OU

IUIU


Active radio hop


LAN 2 LAN 2

LAN 1 LAN 1

LAN 4 LAN 4

LAN 3 LAN 3


Eth-1Eth-2

Eth-1Eth-2

Eth-1Eth-2

Eth-1Eth-2

FB1

FB1

FB1

FB1


4.3 EPIU in full switch mode

OUIU IUOU

OU OU

IUIU


Active radio hop


LAN 3 LAN 3

LAN 2 LAN 2

LAN 1 LAN 1

X

X

X Full switch mode


FB1

FB1

FB1

FB1

Eth-1Eth-2

Eth-1

Eth-2

Eth-1

Eth-1


5. EPIU repeater station examples (unprotected)

1. Channel separation mode (preferred)

2. Capacity sharing mode

3. Full switch mode (see item 1 to avoid alarms about unused Ethernet interfaces)

IUOU OU

OUIUIUOU

OUIU

X

OU


5.1 EPIU repeater station examples (2OU protected)



3. Full switch mode

IUIUOU

IU

X

OU

IUOU

OU

IU OU

OU

OU OU

OU

OU

IU OU

OUX


5.2 EPIU repeater station examples (2IU protected)



3. Full switch mode (do not use at chaining site)

IUOUIUOU IU OU

IU OUswitch

X

IUOUIU

OU IU OUIU

OU2xswitch

X

X


6. FIU19E with 4*2M / EPIU / FlexBus –plug-in units


7.1 1st Animation about 2IU Protection

OUIU2 IU4OU

OU OU

IU3IU1

LAN 1 LAN 1

LAN 2 LAN 2

POFPOF

•Active OU, Flexbus cable or radio link fails•Ethernet traffic is switched to protecting OU via back plane bus between IU1 and IU2.


7.2 2nd Animation about 2IU Protection

OUIU2 IU4OU

OU OU

IU3IU1

LAN 2 LAN 2

POFPOF

•Initially packet traffic exists only between IU1 and IU3•Active IU fails (IU1), IU switchover happens at near end•IU1 does not send any packets to Ethernet switch anymore•Packets start coming to Ethernet switch through IU2•Ethernet switch learns that packets come only through IU2•Ethernet switch starts transmitting packets to IU2 directly after a timeout. Typically this timeout lasts about 5 minutes (address table ageing time). Typically one Ethernet MAC address exists only behind one port…. It is a special/fault situation if same MAC address can be found behind two ports.

Ethernetswitch


7.3 3rd Animation about 2IU Protection

OUIU IUOU

OU OU

IUIU

LAN 1 LAN 1

LAN 2 LAN 2

POF

POF

•EPIU fails on active IU•No changeover will happen (2IU protection is intended originally for protecting E1 traffic)


8. Notes & Restrictions• If EPIU is attached to a device that does not support auto-negotiation and that supports either full duplex

10/100 Base-T interface, then one has to configure the respective interface on EPIU to operate in full duplex 10 or full duplex 100 mode. If auto-negotiation is used in this case, it would select a wrong operating mode. This feature is originating from auto-negotiation standard, it is not a SW/HW failure.

• Flow control is a special feature which is not widely used. It should be disabled as default. It can be enabled only when the user really understands the drawbacks and benefits of it. For example TCP/IP networks expect that packets get lost when network is congested. If part of packets are not dropped this will eventually slow down network performance & throughput.

• Flow control has to be enabled on both sides of the Ethernet radio link, it does not work correctly if enabled only on one side. Flow control can be used in all EPIU operating modes (channel separation, capacity sharing, full switch modes). Flow control works only on full duplex link segments.

• Tree and branch network topologies are supported for Ethernet traffic with EPIU. EPIU does not support ring topology as such. Ring topology is supported only if there is a spanning tree capable switch included in the ring so that it disables multiple paths to same destination in single Ethernet network (Ethernet LAN).

• Link Loss Forwarding (LLF) is a special feature it has not yet been widely used in Ethernet networks. When it is used it should be enabled on both sides of Ethernet radio hop. Otherwise link loss information does not pass over the radio link. LLF was originally designed (by Cisco) to be used in load sharing applications where two parallel links are used to give 2X throughput. If one of the links fail, this is detected faster by using LLF. When one link fails its traffic will be directed faster to remaining link.

• Link loss forwarding does not work in full switch mode.• Load sharing: EPIU does not support load sharing as such. External equipment has to be used for doing load

sharing over two (or more) parallel links.• If one uses capacity sharing mode, it has to be used on both sides of the radio hop. Capacity sharing ratio

needs to be same on both sides of the hop. It is preferred to use same FB interface on both sides of the hop when using capacity sharing mode.

• Capacity sharing mode FB1 – FB2 crosses ETH1-ETH2 signals, capacity sharing ratio needs to be mirrored also.• In capacity sharing mode one needs to use two FIU 19E’s to build a repeater station. External Ethernet cables

are needed for looping Ethernet interfaces.


9. Some bad EPIU configurations

1. Loop in the network, broadcast & unicast traffic will finally block the network

2. Ethernet interface capacity is much smaller than radio links Ethernet capacity. Maximum utilization of half duplex Ethernet segment is usually 30% of links capacity. At 10 Base-T link segment the utilization would be about 3.5 Mbits/s. This is much less than radio links maximum Ethernet capacity. Also note that on half duplex segment only one host can send at a time.

3. Payload Ethernet interface connected to IP DCN interface. IP DCN traffic should be kept separated from Ethernet payload traffic for network security reasons.

XX

X

OUIU1

IU2

OU LANLANFB2 FB2

Eth-N

Eth-2Eth: 16x2M

X10 base-T hub

1.

2.

OUIU1FB2

X

3.


10. IP DCN data channels in FIU 19E C1.5 and C2.0

• FIU 19E can route between 10 Base-T Ethernet interface and PPP interfaces• FIU 19E supports up to three radios for IP DCN (I.e. three PPP links between IU’s)• PPP traffic is carried inside radio frame overhead bits• PPP Interfaces:

• AUX Fast & Hop LAN supported in FIU 19E C2.0• HOP LAN supported in FIU 19E C1.5• Hop LAN is supported also in FIU 19E C2.0 for downward compatibility

• 3rd party IP equipment (BTS, etc) on FIU 19E site can be connected to same IP DCN.

• See CT Home page for additional info about FIU 19E C1.5 & C2.0• FIU 19E web page (C1.5 & C2.0)

• Restrictions: • AUX Fast channel cannot be used simultaneously by AUX plug in unit and IP DCN• Routing capacity of FIU 19E must be taken into account

Radio capacity Hop LAN

FIU 19E C1.5&C2.0

[ kbits/s ]

AUX Fast

in FIU 19E C2.0

[ kbits/s ]

16x2M 80 512

8x2M 57 256

4x2M 28 128

2x2M 14 64


AUX Fast

10.1 IP DCN data channels C1.5 vs. C2.0

(inside radio frame overhead bytes)

C2.0IU

OU OU

C2.0IU

C1.5IU

FEC LAN FEC LANHOP LAN


OU OU

10Base-T

AUX FastOU OUC2.0IU



11. AUX Plug in unit

• Provides access to both AUX Fast and AUX Slow data channels at the same time.

• It is possible to use AUX plug in unit in slot 1 and cross connect its signal to FB2, same applies to FB1 and slot 2.

• Is it possible to use AUX Fast channel for IP DCN and AUX slow by plug in unit at the same time?

• AUX plug in unit can be used in slots 1-3

• Restrictions:• Plug-in unit needs to be installed to same slot on both sides of

the hop• Two AUX plug-in units can be used simultaneously on same FIU

19• AUX plug-in units cannot be simultaneously used in slots 2 and

3• The same AUX Fast channel cannot be used simultaneously by

AUX plug-in unit and IP DCN traffic• Use of AUX Fast plug in unit does not restrict the use of Hop

LAN


11.1 FIU19/FIU19E Aux data plug-in unit ...1

FIU19/FIU19E Aux data plug-in unit, aux slow channels

FIU19/FIU19E Aux data plug-in unit, aux fast channels


11.2 FIU19/FIU19E Aux data plug-in unit ...2

FIU19/FIU19E Aux data plug-in unit, TTL-type I/O channels

FIU19/FIU19E Aux data plug-in unit, relay controls


12. Introduction to exercises:• Two test environments:

1. Unprotected radio hop2. 2IU protected radio hop

• Laptop/PC used to download video clips through Ethernet radio hop• Use Quicktime to download video clips because it allows showing the movie while

download is ongoing.• Laptops Ethernet port is reserved for testing the transfer of Ethernet payload traffic.• Use laptops serial port for configuring FIU 19E’s,

• Six exercises for Ethernet plug in unit:1. Channel separation mode2. Capacity sharing mode3. Full switch mode4. Test loops5. Ethernet statistics window6. 2IU protected configuration setup + forced changeover


Exercise 1: Channel separation mode• General description:

• Establish a single radio hop with 16x2M capacity, reserve 10x2M of links capacity for Ethernet traffic and 6x2M for E1 traffic, use FB2 & Eth-2 interfaces.

• Make EPIU Settings for both IU1 and IU2: Check that EPIU Ethernet interfaces are in auto-negotiation mode, interface enabled Check that LLF and flow control are disabled Use Channel separation mode Reserve 10x2M of radio links capacity for Ethernet traffic (Note: FB2 < SIO2< Eth-2) Packet buffer size selection is at its default value (32 Kbytes)

• Open E1 cross connection window Connect 4xE1 over the hop. Note that Ethernet traffic reserves part of links capacity for Ethernet traffic

• Connect Ethernet cables for IU1 and IU2: Connect Eth-2 on IU1 to PC, Connect Eth-2 on IU2 to LAN

PDH PDH

PDH PDH

OUIU1 IU2OU

LANLAN

6xE16xE1 FB2 FB2

Eth-2Eth-2

16x2M

Eth: 10x2ME1: 6x2M


Exercise 1: continued..• General description:

• Check that Ethernet radio hop is established correctly, check PDH traffic over the radio link. • Checks that can be done by Hopper Manager to check that Ethernet hop is established correctly:

Check Eth-2 link status LED’s on both sides of the hop, they should be lit Close & reopen EPIU settings menu to check current Ethernet interface mode

What is the current operating mode for Eth-2 on IU1 ________ and IU2 __________ Check alarm window & history, there should be no active alarms. Open Maintenance -> Performance -> Counters for Ethernet 2 interface Clear the performance counters for Ethernet 2 interface, leave window open for later viewing

• Verifying that Ethernet radio hop works correctly: Open a command window on the PC (Start –> run.. : cmd <enter>) Run the following ping command: ping www.connecting.nokia.com Ping should return something like:

H:\>ping www.connecting.nokia.comPinging www3ntc.ntc.nokia.com [172.21.140.34] with 32 bytes of data:Reply from 172.21.140.34: bytes=32 time<10ms TTL=250Reply from 172.21.140.34: bytes=32 time<10ms TTL=250Reply from 172.21.140.34: bytes=32 time<10ms TTL=250Reply from 172.21.140.34: bytes=32 time<10ms TTL=250Ping statistics for 172.21.140.34: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms

• Download example: Open Internet explorer Clear internet explorer cache: Tools -> Internet Options… -> (Delete Files + OK) Download a large file from …

• Check that performance counters of Ethernet plug in unit are updated (on IU1) Write down the number of InOctets __________________ and OutOctets ____________________.

• Check that LED is showing link activity on ETH-2 interface during download.


Exercise 2: Full switch mode• General description:

• Use same setup as in exercise 1 with following exceptions• Use full switch mode and enable both Ethernet interfaces on IU1

• Verify that it is possible to connect to LAN through both ports of EPIU on IU1

• Check FIU19E alarm window to see if there are any active alarms, there shouldn’t be any.

• Note: there is an unwanted alarm about unconnected Ethernet cable on IU1. This will probably be fixed in later SW releases.

PDH PDH

PDH PDH

OUIU1 IU2OU

LANLAN

6xE16xE1 FB2 FB2

Eth-2Eth-2

16x2M

Eth: 10x2ME1: 6x2M

X


Exercise 3: Capacity sharing mode• General description:

• Establish a single radio hop with 8x2M capacity• Reserve all of radio links capacity to Ethernet traffic• Set EPIU to capacity sharing mode• Allocate 128 kbits/s for ETH-2 traffic and rest of the capacity is left for Eth-1 interface (16256 kbits/s).

• Make same EPIU Settings for both IU1 and IU2

• Verify that both Ethernet links operate correctly by Checking alarm windows on both IU’s. Pinging www.connecting.nokia.com through both Ethernet interfaces

• Try downloading a large file through Eth-2 from … to check that capacity that is allocated to Eth-2 is really 128 Kbits/s.

Write down downloaded file size: __________ & time for downloading : ________ Note: data that is transferred over radio link is embedded to IP, Ethernet and HDLC frames thus

throughput seems to be lower than expected.


Exercise 4: Test loops• General description:

• Verify that you are able to use EPIU test loops• To be able to do the test with one radio hop, one needs to use capacity sharing mode on both IU1 and IU2. • Test loop settings can be found from Hopper Manager at: Maintenance -> Tests -> Loopbacks

• Configure EPIU’s on both IU1 and IU2 to capacity sharing mode • Enable all interfaces, • Radio link capacity and and capacity sharing ratio can be selected freely

• 1. Make crossed loop on IU1 to interface for Ethernet traffic• Use ping to test that the loop works correctly• Remove loop setting

• 2. Make Crossed far end loop to equipment (loop at IU2), configure the loop via IU1• Use ping to test that the loop works correctly• Remove loop settings, or wait until loop setting times out

• Note: non crossed loops cannot be used for debugging unless you have Smartbits test equipment

OUIU1 IU2OU

LANLAN

FB2 FB2

Eth-2

16x2M

Eth: 10x2ME1: 6x2M


Exercise 5: Misc Items• Link Loss forwarding

• Familiarize with EPIU statistics window, check all 4 ports of EPIU

• Familiarize with EPIU SW download window• Try changing EPIU SW and activate new SW to see LED behaviour and 20 s startup time after download

• Auto-negotiation features:• Suppose attached device only supports Full Duplex 100 Base-T and it does not advertise its links

capability via auto-negotiation. In this case the use has to configure EPIU interface to work in FD 100 mode.

• Same stuff applies to 10 FD, one has to configure EPIU to 10 FD mode.

• Setting EPIU BER limits + disabling SIO traffic

• EPIU related alarms


Exercise 6: 2IU Protected hop• General description:

• Establish a 2IU protected radio hop with 16x2M capacity, reserve 15x2M of links capacity for Ethernet traffic and 1x2M for E1 traffic

• Make EPIU Settings for Ethernet 1 interface on both IU1 and IU2: Check that EPIU port 1 is in auto-negotiation mode and interface is enabled Check that LLF is ON and flow control is OFF Use Channel separation mode Reserve 15x2M of radio links capacity for Ethernet traffic (Note: FB1 < SIO1< Eth-1) Packet buffer size selection is at its default value (32 Kbytes)

• Open E1 cross connection window and connect 1xE1 over the hop.

• Connect Ethernet cables for IU1 and IU2 according to following picture: Connect Eth-1 on both IU1A and IU1B through switch to PC, Connect Eth-1 on IU2A&B through switch to

LAN

OUIU IUOU

OU OU

IUIU

LAN

LAN

switchswitch

Eth-1

Eth-1

Eth-1

Eth-1


Exercise 6: continued..• General description:

• Check that Ethernet radio hop is established correctly, verify IU changeover

• Checks that can be done by Hopper Manager to check that Ethernet hop is established correctly: Check alarm window & history, there should be no active alarms. Close & reopen EPIU settings menu, check current Ethernet interface mode for active unit

What is the current operating mode for Eth-1 on IU1: __________ and IU2: ___________

Open Maintenance -> Performance -> Counters for Ethernet 1 interface Clear the performance counters for Ethernet 1 interface, leave window open for later viewing

• Verifying that Ethernet radio hop works correctly: Open Internet explorer Clear internet explorer cache: Tools -> Internet Options… -> (Delete Files + OK) Download a large file from …

• Check that performance counters of Ethernet plug in unit are updated Write down the number of InOctets __________________ and OutOctets _________________. Verify that OutOctets > downloaded file size. What is the size difference in % ? ___________.

• Force an IU changeover + verify that Ethernet link still works (Note Ethernet link may not work until 5 minutes has elapsed)

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