Re: [j-nsp] SSH/Telnet session hanging

2011-06-02 Thread Mark Tinka
On Thursday, June 02, 2011 08:44:38 PM Serge Vautour wrote: I'm confused by your statement that BGP is limited to 4096. I have BGP peers up with 8192: The smallest size a BGP-4 update message can be is 19 bytes (minimum), while the largest size it can be is 4,096 bytes. The 8,192 bytes

Re: [j-nsp] SSH/Telnet session hanging

2011-06-02 Thread Richard A Steenbergen
On Thu, Jun 02, 2011 at 05:44:38AM -0700, Serge Vautour wrote: Hello, I'm confused by your statement that BGP is limited to 4096. I have BGP peers up with 8192: From RFC4271: 4. Message Formats This section describes message formats used by BGP. BGP messages are sent over TCP

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Muhammad Adnan Mohsin
Hi Alexander rest of the experts, The MTU size in the whole network is set to 4492. But on this router and the router connected to it, the MTU size recommended by the transmission team is 2000. So it's configured 2000 on this router and 1950 is configured on the router that connects to it. Can

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Mark Tinka
On Wednesday, June 01, 2011 05:19:24 PM Muhammad Adnan Mohsin wrote: Hi Alexander rest of the experts, The MTU size in the whole network is set to 4492. But on this router and the router connected to it, the MTU size recommended by the transmission team is 2000. So it's configured 2000 on

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Muhammad Adnan Mohsin
I have resolved the session hanging issue by lowering the MTU value to 1920 on this router. But the BGP session is now flapping a lot and it's flapping with both the RRs now. Should I try the tcp-mss option or should i further play with the MTU value. I lowered the value to 1800 but the flapping

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Alexander Frolkin
Hi, I have resolved the session hanging issue by lowering the MTU value to 1920 on this router. But the BGP session is now flapping a lot and it's flapping with both the RRs now. Should I try the tcp-mss option or should i further play with the MTU value. I lowered the value to 1800 but the

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Muhammad Adnan Mohsin
Dear Alexander, I have found that the maximum PING size is 1870. If the value is 1871 I get a message ping: sendto: Message too long. But at size 1870...I am getting ping drops. The success rate is around 60%. Is it normal to get ping drops? Anyways I have set the MTU to 1870+28=1898 and still

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Alexander Frolkin
Hi, I have found that the maximum PING size is 1870. If the value is 1871 I get a message ping: sendto: Message too long. But at size 1870...I am getting ping drops. The success rate is around 60%. Is it normal to get ping drops? Anyways I have set the MTU to 1870+28=1898 and still observing

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Muhammad Adnan Mohsin
Hi, I was still seeing ping drops without using the size. I adjust the MTU size back to 1950 on this router. I don't see ping drops now but the BGP behavior is now the same again. It's stable with one of the RRs and still flapping with the other RR. regards, Adnan. On Wed, Jun 1, 2011 at 4:21

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Thomas Eichhorn
Do you have MPCs in the MX240? I have seen similiar issues, which had been caused by software bugs - if so, try restarting the linecards and do the software update. Some small packets go through but bigger ones are sometimes dropped... Regards, Tom Am 01.06.2011 15:21, schrieb Alexander

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Mark Tinka
On Wednesday, June 01, 2011 10:06:22 PM Muhammad Adnan Mohsin wrote: Hi, I was still seeing ping drops without using the size. I adjust the MTU size back to 1950 on this router. I don't see ping drops now but the BGP behavior is now the same again. It's stable with one of the RRs and still

Re: [j-nsp] SSH/Telnet session hanging

2011-06-01 Thread Mark Tinka
On Thursday, June 02, 2011 01:58:21 AM Jeff Wheeler wrote: I believe that vendors have made a mistake by changing this default, but it is inconsequential to most networks because they have a consistent MTU across their whole backbone. If you don't, you should base the iBGP TCP MSS on the

[j-nsp] SSH/Telnet session hanging

2011-05-31 Thread Muhammad Adnan Mohsin
Hi Experts, I have a MX240 router installed at a remote location. I am able to telnet/SSH the router but when I run a command that needs to return a large output (e.g. show log messages or show conf) the session hangs and then I have to re-establish the connection. Because of this I couldn't

Re: [j-nsp] SSH/Telnet session hanging

2011-05-31 Thread Doug Hanks
I second the MTU recommendation. -- Doug Hanks, JNCIP-M/T #1441 Systems Engineer Juniper Networks On 5/31/11 1:37 PM, Alexander Frolkin a...@eldamar.org.uk wrote: Hi, I have a MX240 router installed at a remote location. I am able to telnet/SSH the router but when I run a command that

Re: [j-nsp] SSH/Telnet session hanging

2011-05-31 Thread Mark Tinka
On Wednesday, June 01, 2011 05:06:03 AM Doug Hanks wrote: I second the MTU recommendation. Yep - MTU issue. Mark. signature.asc Description: This is a digitally signed message part. ___ juniper-nsp mailing list juniper-nsp@puck.nether.net