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1201
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5
Helpful
6
Replies

E1 Sub interface not coming up

Kaushik Ray
Level 1
Level 1

‎12-06-2012 02:52 AM - edited ‎03-04-2019 06:20 PM

Hello

I am having an issue with an E1 Connection where one of the subinterface is up but the other one stays down.

The configs are as follows:

Router A

-----------------------

!

controller E1 0/1/0

channel-group 0 timeslots 1-28

channel-group 1 timeslots 29-31

!

!

interface Multilink2

bandwidth 1984

ip address 192.168.10.1 255.255.255.252

ip tcp header-compression iphc-format

load-interval 30

ppp multilink

ppp multilink fragment delay 10

ppp multilink interleave

ppp multilink group 2

ip rtp header-compression iphc-format

!

interface Multilink3

bandwidth 64

ip address 10.10.10.1 255.255.255.252

ip tcp header-compression iphc-format

load-interval 30

ppp multilink

ppp multilink fragment delay 10

ppp multilink interleave

ppp multilink group 3

ip rtp header-compression iphc-format

!

!

interface Serial0/1/0:0

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 2

!

interface Serial0/1/0:1

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 3

!

Serial0/1/0:0              unassigned      YES manual up                    up

Serial0/1/0:1              unassigned      YES unset  up                    down

Virtual-Access1            unassigned      NO  TFTP   down                  down

Multilink2                 192.168.10.1    YES NVRAM  up                    up

Multilink3                 10.10.10.1      YES manual down                  down

Router B

-----------------------

!

controller E1 0/2/0

channel-group 0 timeslots 1-28

channel-group 1 timeslots 29-31

!

!

interface Multilink2

bandwidth 1984

ip address 192.168.10.2 255.255.255.252

ip tcp header-compression iphc-format

load-interval 30

ppp multilink

ppp multilink interleave

ppp multilink group 2

ppp multilink fragment delay 10

ip rtp header-compression iphc-format

!

interface Multilink3

bandwidth 64

ip address 10.10.10.2 255.255.255.252

ip tcp header-compression iphc-format

load-interval 30

ppp multilink

ppp multilink interleave

ppp multilink group 3

ppp multilink fragment delay 10

ip rtp header-compression iphc-format

!

!

interface Serial0/2/0:0

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 2

!

interface Serial0/2/0:1

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 3

!

Serial0/2/0:0              unassigned      YES unset  up                    up

Serial0/2/0:1              unassigned      YES unset  up                    down

Loopback0                  10.183.32.4     YES NVRAM  up                    up

Multilink2                 192.168.10.2    YES NVRAM  up                    up

Multilink3                 10.10.10.2      YES manual down                  down

Labels:
0 Helpful
6 Replies 6

Giuseppe Larosa
Hall of Fame
Hall of Fame

‎12-06-2012 02:57 AM

Hello Kaushik,

I'm afraid you should use two channel-group numbers like 1 and 2, channel-group 0 is fine when associating all the timeslots to it, or for unframed operation.

I would not use channel-group 0 in this scenario

Hope to help

Giuseppe

0 Helpful

Kaushik Ray
Level 1
Level 1
In response to Giuseppe Larosa

‎12-06-2012 03:27 AM

Thanks Giuseppe

I changed to following but the issue remains:

Router A

---------------------------

!

controller E1 0/1/0

channel-group 1 timeslots 1-29

channel-group 2 timeslots 30-31

!

interface Multilink2

bandwidth 1984

ip address 192.168.10.1 255.255.255.252

ip tcp header-compression iphc-format

load-interval 30

ppp multilink

ppp multilink fragment delay 10

ppp multilink interleave

ppp multilink group 2

ip rtp header-compression iphc-format

!

interface Multilink3

bandwidth 64

ip address 10.10.10.1 255.255.255.252

ip tcp header-compression iphc-format

load-interval 30

ppp multilink

ppp multilink fragment delay 10

ppp multilink interleave

ppp multilink group 3

ip rtp header-compression iphc-format

!

interface Serial0/1/0:1

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 2

!

interface Serial0/1/0:2

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 3

!

Serial0/1/0:1              unassigned      YES manual up                    up

Serial0/1/0:2              unassigned      YES manual up                    down

Multilink2                 192.168.10.1    YES manual up                    up

Multilink3                 10.10.10.1      YES manual down                  down

Router B

---------------------------

!

controller E1 0/2/0

channel-group 1 timeslots 1-29

channel-group 2 timeslots 30-31

!

!

interface Multilink2

bandwidth 1984

ip address 192.168.10.2 255.255.255.252

ip tcp header-compression iphc-format

load-interval 30

ppp multilink

ppp multilink interleave

ppp multilink group 2

ppp multilink fragment delay 10

ip rtp header-compression iphc-format

!

interface Multilink3

bandwidth 64

ip address 10.10.10.2 255.255.255.252

ip tcp header-compression iphc-format

load-interval 30

ppp multilink

ppp multilink interleave

ppp multilink group 3

ppp multilink fragment delay 10

ip rtp header-compression iphc-format

!

!

interface Serial0/2/0:1

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 2

!

interface Serial0/2/0:2

no ip address

encapsulation ppp

ppp multilink

ppp multilink group 3

Serial0/2/0:1              unassigned      YES unset  up                    up

Serial0/2/0:2              unassigned      YES unset  up                    down

Loopback0                  10.183.32.4     YES NVRAM  up                    up

Multilink2                 192.168.10.2    YES NVRAM  up                    up

Multilink3                 10.10.10.2      YES manual down                  down

Flaps a lot

Dec  6 11:15:41.283 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to down

Dec  6 11:16:03.439 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to up

Dec  6 11:16:03.451 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to down

Dec  6 11:16:07.471 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to up

Dec  6 11:16:07.483 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to down

Dec  6 11:16:11.503 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to up

Dec  6 11:16:13.523 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to down

Dec  6 11:16:17.551 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to up

Dec  6 11:16:19.571 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to down

Dec  6 11:16:23.599 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to up

Dec  6 11:16:23.611 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/2/0:2, changed state to down

0 Helpful

Kaushik Ray
Level 1
Level 1
In response to Kaushik Ray

‎12-06-2012 03:31 AM

When i shut down the Mu3

the serial interface comes up!!

Serial0/2/0:1              unassigned      YES unset  up                    up

Serial0/2/0:2              unassigned      YES unset  up                    up

Loopback0                  10.183.32.4     YES NVRAM  up                    up

Multilink2                 192.168.10.2    YES NVRAM  up                    up

Multilink3                 10.10.10.2      YES manual administratively down down

0 Helpful

Giuseppe Larosa
Hall of Fame
Hall of Fame
In response to Kaushik Ray

‎12-06-2012 03:46 AM

Hello Kaushik,

I see

I hadn't used the multilink bundles the derived serial interfaces se0/2/0:1 and se0/2/0:2 can be used directly as L3 interfaces.

Hope to help

Giuseppe

Kaushik Ray
Level 1
Level 1
In response to Giuseppe Larosa

‎12-06-2012 04:26 AM

Thanks Giuseppe

i removed the multilink and set it directly as L3 interfaces and it now looks like it is working.

Many Thanks for all your help with this.

Kaushik

0 Helpful

Raju Sekharan
Cisco Employee
Cisco Employee
In response to Kaushik Ray

‎12-06-2012 04:45 AM 

Hi Kaushik

In order to have multiple multilinks beween two routers, you need to
configure different authenticated usernames for each bundle.

http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a0080093c1d.shtml

Thank you

Raju

0 Helpful
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