Might be MTU? Can you try what happens with `find /` ? If it freezes then, too:
On both machines: ping -s 1252 -D $remote_IP if it works, increase by half the way to 1472, try if it still works: ping -s 1362 -D $remote_IP etc. If it does not work, you half the distance to the previously working one, e.g.: ping -s 1362 -D $remote_IP << works ping -s 1417 -D $remote_IP << does not work then next: ping -s 1390 -D $remote_IP If you use IPv6, you need to decrease the starting/end value by 20 and use ping6, i.e., as min 1232 and as max 1452; If the hosts cannot reach each other directly (NAT), it depends on the path which addr to use; Would need traceroutes between the hosts then. The assumption would be that you do have an MTU issue on-path there, which is not correctly signaled. This only hits as soon as the packets get a size larger than the MTU, e.g., when typing dmesg (or find /). With best regards, Tobias On Sat, 2024-03-09 at 16:07 +0000, Laura Smith wrote: > Hi > > I've got a fresh install of 7.4 on a new box and am seeing a very > weird problem. > > If I enter "dmesg" I get a few lines of output and then it hangs and > my ssh connection gets dropped. I ran syspatch, rebooted and the > problem persists. > > Example: > > # dmesg > MX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS- > CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2 > ,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,R > DTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,BMI1,AVX2,SM > EP,BMI2,ERMS,INVPCID,RDSEED,ADX,SMAP,CLFLUSHOPT,CLWB,PT,SHA,UMIP,PKU, > WAITPKG,PKS,MD_CLEAR,IBT,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,IBRS_A > LL,SKIP_L1DFL,MDS_NO,IF_PSCHANGE,TAA_NO,MISC_PKG_CT,ENERGY_FILT,DOITM > ,SBDR_SSDP_N,FBSDP_NO,PSDP_NO,RRSBA,OVERCLOCK,XSAVEOPT,XSAVEC,XGETBV1 > ,XSAVES > cpu19: 32KB 64b/line 8-way D-cache, 64KB 64b/line 8-way I-cache, 2MB > 64b/line 16-way L2 cache, 30MB 64b/line 12-way L3 cache > cpu19: smt 0, core 35, package 0 > cpu20 at mainbus0: apid 72 (application processor) > cpu20: 12th Gen Intel(R) Core(TM) i9-12900TE, 3392.18 MHz, 06-97-02, > patch 00000025 > Timeout, server 10.1.2.3 not responding.
