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Bug 791 - [ANKK:4000] / APV /Webagent + SLB Abnormal MSS value
Review Request #378 — Created July 29, 2024 and submitted
| Information | |
|---|---|
| kdutta | |
| APV10 | |
| rel_apv_10_7 | |
| 791 | |
| Reviewers | |
| mmiriam, pradeep, prajesh, satyendra, tanya, timlai | |
Bug 791 - [ANKK:4000] / APV /Webagent + SLB Abnormal MSS value
Configure APV
A2JJNpshK3#sh slb all
slb real tcp "RS_WS" 192.168.162.155 80 0 icmp 3 3
slb mode activeclose on "RS_WS"
slb virtual tcp "VS_WS" 192.168.162.195 80 arp 0
slb virtual health off
slb policy static "VS_WS" "RS_WS"
slb directfwd on
slb directfwd syncache off
slb directfwd statistics on
slb directfwd on "VS_WS"
slb mode ircookie plainname
slb mode icookie always
slb mode activeclose off
slb mode keepport off
slb tcpoption mss "VS_WS" 1200
slb ftps datachannel 0
slb ftp datachannel 20
slb tuxedo portposition 78
slb mode regexcase off
slb mode lineup off "VS_WS"
slb overload persistence off
slb sip persistence timeout 120A2JJNpshK3#show webagent service
webagent service "w1" 192.168.162.195 2001 0A2JJNpshK3#show slb tcpoption
slb tcpoption mss "VS_WS" size 1200A2JJNpshK3#
Test with pacp from Origin Server
Take pcap on origin server you can see received SYN packet has the same mss 1200.
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ntohs(orig_mss) >= FASTTCP_AN_LOOPBACK_MSS Should be a better check? |
 prajesh
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Is this passing interface of the incoming packet, so you can use it in line mtu = real_ifp->if_mtu? |
 tanya
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it called with null in couple of more places. please check those too. |
tanya
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we set to default mss if vs is not configured, because the mss value from loopback is too large to … |
tanya
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branches/rel_apv_10_7/usr/src/sys/click/netinet/click_input.c (Diff revision 1) Is this passing interface of the incoming packet, so you can use it in line mtu = real_ifp->if_mtu?
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branches/rel_apv_10_7/usr/src/sys/click/netinet/click_input.c (Diff revision 1) it called with null in couple of more places. please check those too.
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branches/rel_apv_10_7/usr/src/sys/click/app/fastslb/fastslb_tcp.c (Diff revision 1) ntohs(orig_mss) >= FASTTCP_AN_LOOPBACK_MSS Should be a better check?
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branches/rel_apv_10_7/usr/src/sys/click/app/fastslb/fastslb_tcp.c (Diff revision 4) we set to default mss if vs is not configured, because the mss value from loopback is too large to keep anyway.
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