2500 IOS and MBGP problem

[samsam_wang]

my IOS file is c2500-js-l.122-21a.bin

and cisco said the IOS support MBGP, but no.

my configuration is

ip multicast-routing

router bgp xx

nei 1.1.1.1 remote yy ?

when I enter ?, only <cr> there, no "nlri",

any ideas?

Thanks

[Harold Ritter]

This CLI has been replaced by the new address-family model. Here's an example.

router bgp 1

no synchronization

bgp log-neighbor-changes

network 1.0.0.0

neighbor 2.2.2.2 remote-as 1

neighbor 2.2.2.2 update-source Loopback0

no auto-summary

!

address-family ipv4 multicast

neighbor 2.2.2.2 activate

exit-address-family

!

Hope this helps,

[samsam_wang]

thanks a lot.

I can not use "multicast" and "unicast" together, this is right? because I use "neighbor 2.2.2.2 remote 1 nlri multicast unicast" before. now, I should configure "multicast" and "unicast" seperately?

just like

Address-familiy ipv4 multicast

xxxxxxxxxxxx

address-family ipv4 unicast

yyyyyyyyyyyy

right ?

ask one more question, why I can not use IOS 12.3.6 for the 2500, it seems the IOS file is so big(exceed size)

Thanks again

[Harold Ritter]

You are correct. You have to configure a separate address-family statement for multicast and unicast (or VRF also available in the version you are running).

Regarding your other question, the minimum requirements to support 12.3(6) IP Only Feature set is 12MB DRAM and 16MB Flash. So unless you have less memory than that installed on your router, you should be fine.

[samsam_wang]

for the unicast, it is default, so I think I don't need to configure that, right?

For the IOS,

c2500-is-l.123-6.bin size is 16544 KB

the Flash is 16384K

All my 2500 are 16/16, and the IOS of 12.3.6 didn't work

[Harold Ritter]

That's correct, IPv4 is the default and doesn't need to be explicitly configured as seen below:

router bgp 1

bgp log-neighbor-changes

neighbor 2.2.2.2 remote-as 1

neighbor 2.2.2.2 update-source Loopback0

!

address-family ipv4 multicast

neighbor 2.2.2.2 activate

exit-address-family

R1#sh ip bgp nei

BGP neighbor is 2.2.2.2, remote AS 1, internal link

BGP version 4, remote router ID 2.2.2.2

BGP state = Established, up for 00:00:07

Last read 00:00:07, hold time is 180, keepalive interval is 60 seconds

Neighbor capabilities:

Route refresh: advertised and received(old & new)

Address family IPv4 Unicast: advertised and received

Address family IPv4 Multicast: advertised and received

Although not explicitly specified, ipv4 unicast show as advertised in the neighbor capabilities of the output of the "sh bgp nei" command.

If you don't need the default ipv4 unicast address-family, you can use the following command:

router bgp 1

no bgp default ipv4-unicast

R1#sh ip bgp nei

BGP neighbor is 2.2.2.2, remote AS 1, internal link

BGP version 4, remote router ID 2.2.2.2

BGP state = Established, up for 00:00:25

Last read 00:00:25, hold time is 180, keepalive interval is 60 seconds

Neighbor capabilities:

Route refresh: advertised and received(old & new)

Address family IPv4 Multicast: advertised and received

As you can see the address-family ipv4 unicast has been removed from the capability exchange.

As far as the size of 12.3(6) IP Plus is concerned, you are right the requirements should be greater than 16MB of Flash memory. I will make sure that I follow up with the CCO team so that they get the minimum requirement changed for this image.

Hope this helps,

[samsam_wang]

Thanks a lot.

The MBGP,MSDP,SSM are in the real network now?

[Harold Ritter]

I have seen MBGP and MSDP in numerous designs over the last two to three years. I'm sure that there are people out there using SSM but is not as commonly seend as the other two protocols.

BTW: I already have an internal case to get the flash memory requirement change on CCO for 12.3(6) IP Plus.