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Do SRX boxes support RFC 4638 - PPPoE 1500 byte payload negotiation?

‎11-02-2011 05:33 AM

Hi,

 

I am new to Juniper and have been looking at the SRX line. I have been trying to find out over the last few days if they support RFC 4638 to allow 1500byte payload over a PPPoE connection? Several searching across these boards, the KB and the web haven't really helped.

Can anyone confirm if there is software support for this? Presumably if they do as with other vendors this would only be on a Gigabit Ethernet interface so would require a SRX210 or above?

Thanks. 

3 REPLIES 3
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Re: Do SRX boxes support RFC 4638 - PPPoE 1500 byte payload negotiation?

‎03-11-2014 02:51 AM

Sorry for kicking such old topic. I really would like to have RFC4638 support on the SRX. Is there any news about this?

JNCIA-Junos, JNCIS-SEC, CCNA, LPI1, soon more...
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Re: Do SRX boxes support RFC 4638 - PPPoE 1500 byte payload negotiation?

‎05-25-2016 04:41 AM

and again...

Does the SRX300 maybe support RFC4638 ?

JNCIA-Junos, JNCIS-SEC, CCNA, LPI1, soon more...
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Re: Do SRX boxes support RFC 4638 - PPPoE 1500 byte payload negotiation?

2 weeks ago

Just tried it on SRX340, 18.4R3-S4.2 as a PPPoE client and apparently it's working.

Bumped mtu on an underlying interface to 1522, and used this config for pp0:

unit 0 {
    point-to-point;
    ppp-options {
        chap {
            default-chap-secret xxxxxxxxxxxxxxxxxxxxx
            local-name xxxxxxxxxxxxxxxxxxxxxx
            passive;
        }
    }
    pppoe-options {
        underlying-interface ge-0/0/0.123;
        idle-timeout 0;
        auto-reconnect 10;
        client;
        ppp-max-payload 1514;
    }
    family inet {
        negotiate-address;
    }

 

Interface looks like this:

Physical interface: pp0, Enabled, Physical link is Up
  Type: PPPoE, Link-level type: PPPoE, MTU: 1532
(...)
Logical interface pp0.0 
(...)
    Protocol inet, MTU: 1500

 

...and a simple test from a host behind the SRX:

ping 8.8.8.8 -l 1472 -f -t
Reply from 8.8.8.8: bytes=68 (sent 1472) time=25ms TTL=112
Reply from 8.8.8.8: bytes=68 (sent 1472) time=25ms TTL=112
Reply from 8.8.8.8: bytes=68 (sent 1472) time=25ms TTL=112
Reply from 8.8.8.8: bytes=68 (sent 1472) time=25ms TTL=112
Reply from 8.8.8.8: bytes=68 (sent 1472) time=25ms TTL=112
Reply from 8.8.8.8: bytes=68 (sent 1472) time=25ms TTL=112
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