[j-nsp] BGP Extended Community sub-type as zero not valid

[heisenbug at xpto]

Hi,

I'm doing some tests with Juniper devices (srx, vmx, vrr, ptx, mx) (from 
junos 15 to 18) and the result are the same, maybe is something that I'm 
not seeing. The purposed environment for test:

AS2222(2bytes) <-> AS222222(4bytes)

AS2222 is announcing the network 172.255.255.0 and setting the ext 
community rt:1:222222(for lab purpose). For example(this is working):
AS222222# run show route protocol bgp extensive

inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
172.255.255.0/24 (1 entry, 1 announced)
TSI:
KRT in-kernel 172.255.255.0/24 -> {172.0.0.1}
         *BGP    Preference: 170/-101
                 Next hop type: Router, Next hop index: 524
                 Address: 0xb3a1030
                 Next-hop reference count: 2
                 Source: 172.0.0.1
                 Next hop: 172.0.0.1 via em1.0, selected
                 Session Id: 0x0
                 State: <Active Ext>
                 Local AS: 222222 Peer AS:  2222
                 Age: 3:43
                 Validation State: unverified
                 Task: BGP_2222.172.0.0.1
                 Announcement bits (1): 0-KRT
                 AS path: 2222 I
                 Communities: target:1:222222
                 Accepted
                 Localpref: 100
                 Router ID: 172.0.0.1

But if I try to set the sub-type as 0 (zero), Juniper dons't accept 
(https://tools.ietf.org/rfc/rfc4360.txt).


[edit]
AS2222# delete policy-options community TEST

[edit]
AS2222# set policy-options community TEST members target:0:222222

[edit]
AS2222# show | compare
[edit policy-options community TEST]
-   members target:1:222222;
+   members target:0:222222;

[edit]
AS2222# commit
[edit policy-options community TEST]
   'members target:0:222222'
     invalid autonomous system value at '0' not in range 1 to 65535. Use 
'0L' Long format to specify 4 byte AS
error: configuration check-out failed

[edit]
AS2222# delete policy-options community TEST

[edit]
AS2222# set policy-options community TEST members target:0L:222222

[edit]
AS2222# show | compare
[edit policy-options community TEST]
-   members target:1:222222;
+   members target:0L:222222;

[edit]
AS2222# commit
[edit policy-options community TEST]
   'members target:0L:222222'
     invalid autonomous system value at '0' not in range 1 to 4294967295
error: configuration check-out failed

[edit]

Anyone have any idea about? There's another way to do that? I need to 
use zero on this case and other bgp daemons/vendors allow to do that.

Thanks in advance.



[]s