The purpose of WAN-PHY is to render 10 Gigabit Ethernet compatible with the SONET STS-192c format and data rate, as defined by ANSI, as well as the SDH VC-4-64c container specified by ITU. When the controller is in WAN-PHY mode the WIS sublayer transports 10 Gigabit Ethernet frames in an OC-192c SONET payload which can interoperate with SONET section or line level repeaters. This effectively bridges the asynchronous world of Ethernet data with synchronous SONET/SDH transport allowing 10 Gigabit Ethernet to be transparently carried over current DWDM networks without having to directly map the Ethernet frames into SONET/SDH.
PHY device maps 10GE LAN streams to STS-192c SPE and this limits the data-rate to 9.584 Gbps. WAN PHY provides rich SONET OAM capabilities for link management. It is to be noted that WAN PHY line-rate is lower than 10GE LAN rate (10.3125 Gbps).
WAN-PHY InterOP between Cisco & Juniper Topology
Cisco Configuration & show commands
This example shows how to configure the interface for WAN PHY mode:
Cisco Configuration of Signal Failure(SF) and Signal Degrade(SD)
SD/SF BER threshold is configurable using ‘threshold’ command. Software monitors B2 BIP errors and asserts SD/SF BER alarms whenever the error-rate exceeds the threshold. Port link will go down once BIP error-rate exceeds SF BER threshold.
RP/0/RSP0/CPU0:ios#sh controllers wanphy 0/6/0/0 alarms | inc SD BER thresholds: SF = 10e-3 SD = 10e-6
RP/0/RSP0/CPU0:ios#conf t RP/0/RSP0/CPU0:ios(config)#controller wanphy 0/6/0/0 RP/0/RSP0/CPU0:ios(config-wanphy)#threshold ? sd-ber Set Signal Degrade BER threshold sf-ber Set Signal Fail BER threshold
Do the following steps before debugging L2/L3 layer:
1. Check Fiber or optics when B1/B2/B3 counters are incrementing 2. Check for SD_BER or SF_BER alarms in show controller wanphy <> alarms 3. Show controller tengig <> internal
Internal data for interface: TenGigE0/1/0/27 Port Number : 27 Bay Number : 0 Ifinst : 0 Ifinst Subport : 27 Board Type : 0x00380261 Port Type : 10GE Transport mode : WAN BIA MAC addr : 6c9c.ed6f.214b Oper. MAC addr : e0ac.f167.259b Egress MAC addr : e0ac.f167.259b Port Available : true Status polling is : enabled Status events are : enabled I/F Handle : 0x06000780 Cfg Link Enabled : tx/rx enabled H/W Tx Enable : yes MTU : 2000 H/W Speed : 10 Gbps H/W Duplex : Full H/W Loopback Type : None FEC : Disable H/W FlowCtrl Type : None H/W AutoNeg Enable : Off H/W Link Defects : (0x00100000) WANPHY_SD_SF_BER H/W Raw Link Defects : (0x00100000) WANPHY_SD_SF_BER Link Up : yes Link Led Status : Link up -- Green/Amber Serdes hw version : 0.3 Serdes sw version : 8.0 Pluggable Present : yes Pluggable Type : SFP-10G-SR Pluggable PID : SFP-10G-SR Pluggable Compl. : Compliant Pluggable Type Supp.: Supported Pluggable PID Supp. : Supported
Juniper Configuration & Show commands
To set a WAN-PHY on Juniper 10G interface use the following cli:
set interfaces <interface id> framing wan-phy
Configuring the wan-phy framing mode on the 10-Gigabit Ethernet ports allows the interface to accept SONET or SDH frames without further configuration.
If you configure the WAN PHY mode on an aggregated Ethernet interface, you must set the aggregated Ethernet link speed to OC192.
root@JNPR-2-LER5# show interfaces
Jul 15 15:14:11
description "connected to LSR2 ten0/1/0/28 ";
description "connected to LSR2 ten0/1/0/27 ";
Juniper show command:
To display interface information, use the operational mode command show interfaces xe-fpc/pic/port extensive.
root@JNPR-2-LER5# run show interfaces xe-0/0/0 extensive
Jul 15 15:19:59
Physical interface: xe-0/0/0, Enabled, Physical link is Up
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