[c-nsp] E3 Link between 12000 & 72000 VXR

gben gben at oteglobe.net
Fri Mar 9 01:01:25 EST 2007


Hello David,

When configure the 7200 with framing as bypass (disable also scrable 
both-sides) on GSR i get LOF.

Best Regards,
George

David Freedman wrote:
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> I dont think the GSR is using g751 framing in this case so you should be
> able to configure bypass mode on the 7200 (providing you turn off
> scrambling both sides)
>
>
> Dave.
>
> gben wrote:
> | Hello David,
> |
> | On GSR you can not configure the framing.
> |
> | athgsr04(config)#int ser
> | athgsr04(config)#int serial 1/1
> | athgsr04(config-if)#f?
> | full-duplex
> | athgsr04(config-if)#f
> |
> | Best Regards,
> | George
> |
> | David Freedman wrote:
> |
> | Try configuring both for "framing bypass" since you are connecting them
> | back to back.
> | Doing this requires that you disable scrambling.
> |
> | you should also configure "dsu bandwidth 34010"
> |
> | Dave.
> |
> |
> |
> |
> | gben wrote:
> | | Hello All,
> | |
> | | 7200VXR router
> | |
> | 
> ------------------------------------------------------------------------
> | | 7200-FR_switch#sh running-config interface ser 3/0
> | | Building configuration...
> | |
> | | Current configuration : 156 bytes
> | | !
> | | interface Serial3/0
> | | ip address 192.168.1.2 255.255.255.252
> | | no ip directed-broadcast
> | | load-interval 30
> | | framing g751
> | | scramble
> | | dsu bandwidth 34010
> | | end
> | |
> | | 7200-FR_switch#sh controllers ser 3/0             M2T-E3 pa: show
> | | controller:
> | | PAS unit 8, subunit 0, f/w version 3-92, rev ID 0x2800001, version 3
> | | idb = 0x6274D1B0, ds = 0x624DF61C, ssb=0x62556918
> | | Clock mux=0x30, ucmd_ctrl=0x0, port_status=0x1
> | | Serial config=0x8, line config=0x1B0202
> | | maxdgram=4584, bufpool=128Kb, 256 particles
> | |
> | |   rxLOS inactive, rxLOF inactive, rxAIS inactive
> | |   txAIS inactive, rxRAI inactive, txRAI inactive
> | | line state: up
> | | cable type : E3  cable, received clockrate 34015923
> | |
> | | base0 registers=0x3D800000, base1 registers=0x3D802000
> | | mxt_ds=0x6276A0F4, rx ring entries=124, tx ring entries=254
> | | statring=0x2003B400, statr shadow=0x62748034, stat_head=233
> | | rxring=0x2003A820, rxr shadow=0x6274E2B4, rx_head=14
> | | txring=0x20041940, txr shadow=0x62748C60, tx_head=251, tx_tail=251,
> | | tx_count=0
> | | throttled=0, enabled=0
> | | halted=0, last halt reason=0
> | | Microcode fatal errors=0
> | | rx_no_eop_err=0, rx_no_stp_err=0, rx_no_eop_stp_err=0
> | | rx_no_buf=0, rx_soft_overrun_err=0, dump_err= 0, bogus=0,
> | mxt_flags=0x2C
> | | tx_underrun_err=0, tx_soft_underrun_err=0, tx_limited=0(256)
> | | tx_fullring=0, tx_started=11693, mxt_flush_count=0
> | | rx_int_count=3822651, tx_int_count=11693
> | |   Framing is g751, Clock Source is Line,   National Bit is 0
> | |   Bandwidth limit is 34010, DSU mode 0
> | |   Scrambling is enabled
> | |   Data in current interval (0 seconds elapsed):
> | |     0 Line Code Violations, 0 P-bit Coding Violation
> | |     0 C-bit Coding Violation
> | |     0 P-bit Err Secs, 0 P-bit Sev Err Secs
> | |     0 Sev Err Framing Secs, 0 Unavailable Secs
> | |     0 Line Errored Secs, 0 C-bit Errored Secs, 0 C-bit Sev Err Secs
> | |
> | |   No alarms detected.
> | | 7200-FR_switch#
> | | ----------------------------------------GSR
> | | ----------------------------------------------
> | | athgsr04#sh running-config interface ser 1/1
> | | Building configuration...
> | |
> | | Current configuration : 126 bytes
> | | !
> | | interface Serial1/1
> | | ip address 192.168.1.1 255.255.255.252
> | | no ip directed-broadcast
> | | scramble
> | | clock source internal
> | | end
> | |
> | | athgsr04#sh contr
> | | athgsr04#sh controllers ser 1/1
> | |
> | | Interface Serial1/1 (E3 port 1)
> | | hwidb = 0x11FE8220
> | | ssb = 0xA0A6454, ds = 0x85ADBE0
> | | Line state is up
> | |  rxLOS inactive, rxLOF inactive, rxAIS inactive
> | |  txAIS inactive, rxRAI inactive, txRAI inactive
> | | Current configurable parameter settings:
> | |  Loopback is none,
> | |  Clock source is internal
> | |  DSU mode is cisco, DSU bandwidth limit is 34010
> | |  National bit is 0
> | |  Payload scrambling is enabled, CRC is 16
> | |  Bert pattern is disabled, Bert interval is 0
> | |  Transmitter delay is 0, Encapsulation is HDLC
> | |  Idle character is flags, Invert data is disabled
> | |  MTU is 4470
> | | MIB information:
> | |  Data in current interval (274 seconds elapsed):
> | |   0 Line Code Violations,
> | |   0 P-bit Err Secs, 0 P-bit Sev Err Secs
> | |   0 Sev Err Framing Secs, 0 Unavailable Secs
> | |   0 Line Errored Secs
> | |  No alarms detected.
> | | athgsr04#
> | |
> | | Best Regards,
> | | George
> | |
> | | David Freedman wrote:
> | | Can you paste the interface configs of both sides?
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | | gben wrote:
> | |
> | |
> | |
> | | Hello All,
> | |
> | |
> | |
> | | We try to connect a 7200VXR with a GSR through E3 circuit
> | | (Back-to-Back).
> | |
> | | The E3 Serial interface is UP  UP but we can not ping each other.
> | |
> | | The 2 routers establish CDP neighborship and if we enable ISIS the
> | | routers can exchange LSAs and from routing view everything is OK.
> | |
> | | It seems that for some strange reason the IP traffic can not pass 
> over
> | | the E3 interface.
> | |
> | |
> | |
> | |
> | 
> http://www.cisco.com/en/US/customer/products/sw/iosswrel/ps1829/products
> | | _feature_guide09186a0080209dfd.html
> | |
> | 
> <http://www.cisco.com/en/US/customer/products/sw/iosswrel/ps1829/product
> | | s_feature_guide09186a0080209dfd.html>
> | |
> | |
> | | According cisco: Enable scrambling before the data has gone through
> | | subrate processing by using the before subrate processing option with
> | | the scramble command. This configuration is necessary when
> | connecting to
> | |
> | |
> | | Cisco 7200 Router E3 port adapters.
> | |
> | |
> | |
> | | athgsr04(config)#interface Serial 1/1
> | |
> | | athgsr04(config-if)#scr
> | |
> | | athgsr04(config-if)#scramble ?
> | |
> | | <cr>
> | |
> | | The command 
scramble before subrate
 is missing.
> | |
> | | athgsr04#ping 192.168.1.2
> | |
> | | Type escape sequence to abort.
> | |
> | | Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
> | |
> | | .....
> | |
> | | Success rate is 0 percent (0/5)
> | |
> | |
> | |
> | | athgsr04#show interfaces ser 1/1
> | |
> | | Serial1/1 is up, line protocol is up
> | |
> | | Hardware is Packet over E3
> | |
> | | Internet address is 192.168.1.1/30
> | |
> | | MTU 4470 bytes, BW 34010 Kbit, DLY 200 usec, rely 255/255, load 1/255
> | |
> | | Encapsulation HDLC, crc 16, loopback not set
> | |
> | | Keepalive set (10 sec)
> | |
> | | Last input 00:00:05, output 00:00:09, output hang never
> | |
> | | Last clearing of "show interface" counters 01:03:12
> | |
> | | Queueing strategy: fifo
> | |
> | | Output queue 0/40, 0 drops; input queue 0/75, 0 drops
> | |
> | | 5 minute input rate 0 bits/sec, 0 packets/sec
> | |
> | | 5 minute output rate 0 bits/sec, 0 packets/sec
> | |
> | | 442 packets input, 31020 bytes, 0 no buffer
> | |
> | | Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
> | |
> | | 0 parity
> | |
> | | 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> | |
> | | 442 packets output, 30768 bytes, 0 underruns
> | |
> | | 0 output errors, 0 applique, 1 interface resets
> | |
> | | 0 output buffer failures, 0 output buffers swapped out
> | |
> | | 0 carrier transitions
> | |
> | | athgsr04#sh cdp neighbors serial 1/1
> | |
> | | Capability Codes: R - Router, T - Trans Bridge, B - Source Route 
> Bridge
> | |
> | | S - Switch, H - Host, I - IGMP, r - Repeater
> | |
> | |
> | |
> | | Device ID Local Intrfce Holdtme Capability Platform Port ID
> | |
> | | 7200-FR_switch Ser 1/1 128 R 7206VXR Ser 3/0
> | |
> | | athgsr04#
> | |
> | |
> | |
> | | Any ideas? IOS issue ?
> | |
> | |
> | |
> | | Best Regards,
> | |
> | | George
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | |
> | | _______________________________________________
> | |
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> | |
> | |
> | |
> | |
> | 
> ------------------------------------------------------------------------
> | |
> | | No virus found in this outgoing message.
> | | Checked by AVG Free Edition.
> | | Version: 7.5.446 / Virus Database: 268.18.7/713 - Release Date:
> | 3/7/2007 9:24 AM
> |
> |
> | --
> | David Freedman
> | Network Engineering Department
> | Claranet UK Limited
> | http://www.clara.net
> |>
>
> - --
> David Freedman
> Network Engineering Department
> Claranet UK Limited
> http://www.clara.net
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-- 
Best Regards,
____________________________________
George Benekos
OTEGlobe S.A
Technology Division
24x7: +306974477577
Fax: +302103303524
e-mail : george.benekos at oteglobe.net
website : http://www.oteglobe.gr 



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