CESoPSN GRE cpipe sdp

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ronnielvnet
Member
Posts: 6
Joined: 14 Aug 2018 17:58

CESoPSN GRE cpipe sdp

Post by ronnielvnet » 14 Aug 2018 18:17

I am trying to deliver a T1 over our current IP/PSN network. This needs to be delivered using CESoPSN with GRE encapsulation as we do not run MPLS on our network. The MTU end to end supports up to 1546 bytes.

Topology:
T1 from LEC - <7705 1/1/2> - <7705 1/2/7> - <Cisco 3750> - <IP Network> - <Cisco 3750> - <7705 1/2/7> - <7705 1/1/2> - Customer T1 handoff

The SDP opr mode is down.

Config from site A:

Code: Select all

#--------------------------------------------------
echo "Port Configuration"
#--------------------------------------------------
    port 1/1/2
        description "Framed ESF Test"
        tdm
            ds1
                clock-source adaptive
                channel-group 2
                    encap-type cem
                    timeslots 1-24
                    no shutdown
                exit
                no shutdown
            exit
        exit
        no shutdown
    exit
#--------------------------------------------------
echo "Service Configuration"
#--------------------------------------------------
    service
        customer 1 create
            description "Default customer"
        exit
         sdp 200 gre create
            far-end 192.168.1.1
            path-mtu 1400
            keep-alive
                shutdown
            exit
            no shutdown
        exit
          cpipe 888 customer 1 vc-type cesopsn-cas create
            service-mtu 1300
            no shutdown
        exit
      exit
Config from site B:

Code: Select all

#--------------------------------------------------
echo "Port Configuration"
#--------------------------------------------------
    port 1/1/2
        description "Framed ESF Test"
        tdm
            ds1
                clock-source adaptive
                channel-group 2
                    encap-type cem
                    timeslots 1-24
                    no shutdown
                exit
                no shutdown
            exit
        exit
        no shutdown
    exit
#--------------------------------------------------
echo "Service Configuration"
#--------------------------------------------------
    service
        customer 1 create
            description "Default customer"
        exit
         sdp 200 gre create
            far-end 192.168.1.2
            path-mtu 1400
            keep-alive
                shutdown
            exit
            no shutdown
        exit
        cpipe 888 customer 1 vc-type cesopsn-cas create
            service-mtu 1300
            no shutdown
        exit
    exit
What else am I missing here?

Some observations I've had:
From the Cisco I can ping the 7705 with 1546 sized packets
From the 7705 I can only ping the Cisco up to 1518 sized packets (How do I get this to ping it at 1546 bytes?)

Thank you

ronnielvnet
Member
Posts: 6
Joined: 14 Aug 2018 17:58

Re: CESoPSN GRE cpipe sdp

Post by ronnielvnet » 16 Aug 2018 17:06

So one thing I noticed is the SDP Flag KAFailure when I run the show service sdp detail command.

Any idea what a KAFailure means?

Code: Select all

-------------------------------------------------------------------------------
 Sdp Id 200  -(192.168.0.2)
-------------------------------------------------------------------------------
Description           : (Not Specified)
SDP Id               : 200                   SDP Source         : manual
Admin Path MTU       : 1400                  Oper Path MTU      : 1400
Far End              : 192.168.0.2          Delivery           : GRE
Admin State          : Up                    Oper State         : Down
Signaling            : None                  Metric             : 0
Last Status Change   : 01/01/2000 00:00:09   Adv. MTU Over.     : Yes
Last Mgmt Change     : 01/04/2000 02:15:11   VLAN VC Etype      : 0x8100
Flags                : KAFailure

KeepAlive Information :
Admin State          : Enabled               Oper State         : No response
Hello Time           : 10                    Hello Msg Len      : 0
Hello Timeout        : 5                     Unmatched Replies  : 0
Max Drop Count       : 3                     Hold Down Time     : 10
Tx Hello Msgs        : 6                     Rx Hello Msgs      : 0

Associated LSP LIST :
SDP Delivery Mechanism is not MPLS

mivens
Member
Posts: 236
Joined: 28 Sep 2012 06:34

Re: CESoPSN GRE cpipe sdp

Post by mivens » 18 Aug 2018 17:37

KAFailure means Keepalive failure.

From your output, looks like keepalives are being sent but none are being received:

KeepAlive Information :
Admin State          : Enabled               Oper State         : No response
Hello Time           : 10                    Hello Msg Len      : 0
Hello Timeout        : 5                     Unmatched Replies  : 0
Max Drop Count       : 3                     Hold Down Time     : 10
Tx Hello Msgs        : 6                     Rx Hello Msgs      : 0

ronnielvnet
Member
Posts: 6
Joined: 14 Aug 2018 17:58

Re: CESoPSN GRE cpipe sdp

Post by ronnielvnet » 21 Aug 2018 17:32

Okay, so I just disabled/shutdown the keepalives, does it need that for it to work?

I also finally got the SDP to say up/up using GRE delivery, however the T1 ports on the Cisco routers connected to these are still in Alarm and won't come up. So, to get this working I need to configure the following sections right?:

Port 1/1/x (configure the T1 port for tdm, ds1)
service - sdp (configure this thing)
service cpipe

Here's the config I have for those three sections:

Code: Select all

 description "router test port 4"
        tdm
            ds1
                framing ds1-unframed
                clock-source adaptive
                channel-group 1
                    encap-type cem
                    no shutdown
                exit
                no shutdown
            exit
        exit
        no shutdown

Code: Select all

sdp 200 gre create
            far-end 10.10.10.2
            path-mtu 1546
            adv-mtu-override
            keep-alive
                shutdown
            exit
            no shutdown
            

Code: Select all

cpipe 888 customer 1 vc-type cesopsn-cas create
            service-mtu 1300
            spoke-sdp 200:888 create
            exit
            no shutdown
Am I missing anything else?

mivens
Member
Posts: 236
Joined: 28 Sep 2012 06:34

Re: CESoPSN GRE cpipe sdp

Post by mivens » 22 Aug 2018 04:13

What's the output of "show port 1/1/2.ds1 detail"
And "show controller t1 .... " from the Cisco side?

ronnielvnet
Member
Posts: 6
Joined: 14 Aug 2018 17:58

Re: CESoPSN GRE cpipe sdp

Post by ronnielvnet » 04 Sep 2018 15:12

Okay, so I finally figured it out. The only problem now is that a dial-up modem will not work over the circuit emulation.

I can make a phone call through the 7705's, but a regular dial-up modem does not connect. I am going to try hooking up some external GPS clocks to these later and see if that makes a difference.

Any ideas why a dial-up modem will not work but a regular analog phone call works just fine?



Below is the working config I have so far on one unit, the config is similar on the 2nd unit, just different IPs.

To get this working I had to configure the following sections on both ALU 7705's:

T1 Port configuration
Router Configuration
Static Route Configuration
Service Configuration

T1 Port Configuration

Code: Select all

port 1/1/1
        description "test t1 port"
        tdm
            ds1
                framing ds1-unframed
                clock-source adaptive
                channel-group 1
                    encap-type cem
                    no shutdown
                exit
                no shutdown
            exit
        exit
        no shutdown
    exit
Here is the output of the 'info detail' command which shows all the details of the port:

Code: Select all

----------------------------------------------
A:MASTER>config>port# info detail
----------------------------------------------
        description "test t1 port"
        tdm
            buildout short
            length 133
            ds1
                framing ds1-unframed
                no loopback
                clock-source adaptive
                no remote-loop-respond
                no signal-mode
                report-alarm ais los
                no report-alarm oof rai looped ber-sd ber-sf
                no threshold ber-sd
                no threshold ber-sf
                no hold-time
                channel-group 1
                    description "DS0GRP"
                    mode access
                    encap-type cem
                    no mtu
                    no signal-mode
                    timeslots 1-24
                    no idle-cycle-flag
                    idle-payload-fill all-ones
                    no scramble
                    no shutdown
                exit
                no shutdown
            exit
            line-impedance 100
        exit
        no shutdown
----------------------------------------------

Route and Static route configuration. This is just to ensure the ALU's can talk to the loopback interfaces.

Code: Select all

#--------------------------------------------------
echo "Router (Network Side) Configuration"
#--------------------------------------------------
    router
        interface "mainip"
            address 10.91.100.57/24
            port 1/2/7
        exit
        interface "system"
            address 10.10.10.2/32
        exit
        interface "test"
            address 1.1.1.1/24
        exit
        interface "to-Router2"
            address 192.168.100.1/24
        exit
#--------------------------------------------------
echo "Static Route Configuration"
#--------------------------------------------------
        static-route 0.0.0.0/0 next-hop 10.91.100.1
        static-route 10.10.10.1/32 next-hop 10.91.100.58
#--------------------------------------------------

Service Configuration. This is what stumped me for awhile until I read the manual a few times. The SDP creates a GRE tunnel to the far-end IP address.

The cpipe builds the service we want to provide, in this case a SATOP-T1 service. We link it to the T1 port with the SAP 1/1/1.1 create command, then link it to the GRE tunnel with the spoke-sdp 2:200 create command.

Code: Select all

#--------------------------------------------------
echo "Service Configuration"
#--------------------------------------------------
    service
        customer 1 create
            description "Default customer"
        exit
        customer 6323 create
            description "TECHREN SOLAR PID 6323"
        exit
        sdp 2 gre create
            description "GRE to 10.10.10.1"
            far-end 10.10.10.1
            keep-alive
                shutdown
            exit
            no shutdown
        exit
        cpipe 200 customer 6323 vc-type satop-t1 create
            service-mtu 1400
            sap 1/1/1.1 create
            exit
            spoke-sdp 2:200 create
            exit
            no shutdown
        exit
    exit

ronnielvnet
Member
Posts: 6
Joined: 14 Aug 2018 17:58

Re: CESoPSN GRE cpipe sdp

Post by ronnielvnet » 04 Sep 2018 19:37

UPDATE:

I got the GPS 10Mhz clocking source working on both the 7705 units and tested the dial-up modem again.

Results:
I was able to dial-up at 16kbps, but not reliably. It would only dial-up once and failed to connect every time I tried again.
I set the USB modem to a max baud rate of 19200. I was able to connect at 12kbps, but again only once. All subsequent attempts to dial-up failed.

Note: I am using a free NetZero dial-up account to test this. It connects reliably everytime at around 42kbps when connected directly to the phone line, and at around 24kbps when going through the channel banks. When I put in the 7705's into the equation I connect unreliably at around 12-16kbps. Regular phone conversations work fine (although they seem a little quite, but could be because I'm in a noisy data center trying to test this).

Any ideas or suggestions to get this working at least reliably (dial-up should succeed everytime). I'm not as concerned with the baud rate, just that it connects everytime I dial-up.

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