Redistributing loop ?
Hi all,
I'm scratching my head at this one, I'm sure it's something simple though.
The network is completely dynamic, very standard MPLS Layer3 VPNs etc..
The network 10.85.2.0/24 has been disconnected.
Yet Router1 learns it via BGP from Router2.
And Router2 learns it via RIP from Router1
Any assistance is greatly appreciated.
Router 1
core1#show ip route vrf MGT
Routing Table: MGT
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
a - application route
+ - replicated route, % - next hop override
Gateway of last resort is 10.85.1.254 to network 0.0.0.0
S* 0.0.0.0/0 [1/0] via 10.85.1.254
10.0.0.0/8 is variably subnetted, 15 subnets, 3 masks
B 10.75.1.0/24 [200/0] via 10.8.135.23, 7w0d
B 10.75.3.0/24 [200/0] via 10.8.134.23, 7w0d
C 10.85.1.0/24 is directly connected, GigabitEthernet0/0/1
L 10.85.1.3/32 is directly connected, GigabitEthernet0/0/1
B 10.85.2.0/24 [200/1] via 10.8.132.24, 04:25:34
B 10.85.3.0/24 [200/0] via 10.8.133.23, 7w0d
C 10.95.1.100/32 is directly connected, Loopback1500
R 10.95.1.101/32 [120/1] via 10.85.1.4, 00:00:14, GigabitEthernet0/0/1
B 10.95.1.102/32 [200/0] via 10.8.135.23, 7w0d
B 10.95.1.103/32 [200/0] via 10.8.135.24, 7w0d
B 10.95.1.104/32 [200/0] via 10.8.134.23, 7w0d
B 10.95.1.105/32 [200/0] via 10.8.134.24, 7w0d
B 10.95.1.106/32 [200/0] via 10.8.133.24, 7w0d
B 10.95.1.107/32 [200/0] via 10.8.133.23, 7w0d
B 10.95.1.114/32 [200/1] via 10.8.132.24, 04:25:34
S 192.168.50.0/24 [1/0] via 10.85.1.254
Router 2
core2#show ip route vrf MGT
Routing Table: MGT
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is 10.8.132.23 to network 0.0.0.0
B* 0.0.0.0/0 [200/0] via 10.8.132.23, 7w0d
10.0.0.0/8 is variably subnetted, 15 subnets, 2 masks
R 10.75.1.0/24 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.75.3.0/24 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
C 10.85.1.0/24 is directly connected, GigabitEthernet0/1
L 10.85.1.4/32 is directly connected, GigabitEthernet0/1
R 10.85.2.0/24 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.85.3.0/24 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.95.1.100/32 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
C 10.95.1.101/32 is directly connected, Loopback1500
R 10.95.1.102/32 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.95.1.103/32 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.95.1.104/32 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.95.1.105/32 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.95.1.106/32 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.95.1.107/32 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
R 10.95.1.114/32 [120/1] via 10.85.1.3, 00:00:14, GigabitEthernet0/1
S 192.168.50.0/24 [1/0] via 10.85.1.254
These are loopbacks.
Router 1 = 10.8.132.23
Router 2 = 10.8.132.24
My biggest concern is that even though that network no longer existed, 10.85.1.2.
It was still in the routing table.
It almost looked like this network was continuously being learn from neighbouring routers even though the network was no loner connected.
Router 2 would normally learn this network from a direct link from another DataCenter via BGP. Then redistribute it.
The topology is quite simple, 5 sites, all with dual routers acting as P/PE in a standard MPLS configuration.
All Router are full mesh with each other via BGP.
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Thanks, GrahamHello.
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PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/libexec;clear;cd;p=(Software Hardware Memory Diagnostics Power FireWire Thunderbolt USB Fonts 51 4 1000 25 5120 KiB/s 1024 85 \\b%% 20480 1 MB/s 25000 ports 'com.autodesk.AutoCad com.evenflow.dropbox com.google.GoogleDrive' DYLD_INSERT_LIBRARIES\ DYLD_LIBRARY_PATH -86 ` route -n get default|awk '/e:/{print $2}' ` 25 N\\/A down up 102400 25600 recvfrom sendto CFBundleIdentifier 25 25 25 1000 MB );N5=${#p[@]};p[N5]=` networksetup -listnetworkserviceorder|awk ' NR>1 { sub(/^\([0-9]+\) /,"");n=$0;getline;} $NF=="'${p[45]}')" { sub(/.$/,"",$NF);print n;exit;} ' `;f=('\n%s: %s\n' '\n%s\n\n%s\n' '\nRAM details\n%s\n' %s\ %s '%s\n\t(%s)\n' );S0() { echo ' { q=$NF+0;$NF="";u=$(NF-1);$(NF-1)="";gsub(/^ +| +$/,"");if(q>='${p[$1]}')printf("%s (UID %s) is using %s '${p[$2]}'",$0,u,q);} ';};s=(' /^ *$|CSConfigDot/d;s/^ */ /;s/[-0-9A-Fa-f]{22,}/UUID/g;s/(ochat)\.[^.]+(\..+)/\1\2/;/Shared/!s/\/Users\/[^/]+/~/g ' ' s/^ +//;5p;6p;8p;12p;' ' {sub(/^ +/,"")};NR==6;NR==13&&$2<'${p[10]} ' 1s/://;3,6d;/[my].+:/d;s/^ {4}//;H;${ g;s/\n$//;/s: [^EO]|x([^08]|02[^F]|8[^0])/p;} ' ' 5h;6{ H;g;/P/!p;} ' ' ($1~/^Cy/&&$3>'${p[11]}')||($1~/^Cond/&&$2!~/^N/) ' ' /:$/{ s/ *:$//;x;s/\n//;/Apple|Capacity:|Genesy|Intel|SMSC/d;s/\n.*//;/\)$/p;};/^ *(V.+ [0N]|Man).+ /{ s/ 0x.... //;s/[()]//g;s/(.+: )(.+)/ (\2)/;H;} ' ' s/^.*C/C/;H;${ g;/No th|pms/!p;} ' '/= [^GO]/p' '{$1=""};1' ' /Of/!{ s/^.+is |\.//g;p;} ' ' $0&&!/:/;END { if(NR<100)print "com.apple.";} ' ' $3~/[0-9]:[0-9]{2}$/ { gsub(/:[0-9:a-f]{14}/,"");} { print|"tail -n'${p[12]}'";} ' ' NR==2&&$4<='${p[13]}' { print $4;} ' ' END { $2/=256;if($2>='${p[15]}')print int($2) } ' ' NR!=13{next};{sub(/[+-]$/,"",$NF)};'"`S0 21 22`" 'NR==2'"`S0 37 17`" ' NR!=5||$8!~/[RW]/{next};{ $(NF-1)=$1;$NF=int($NF/10000000);for(i=1;i<=3;i++){$i="";$(NF-1-i)="";};};'"`S0 19 20`" 's:^:/:p' '/\.kext\/(Contents\/)?Info\.plist$/p' ' s/^.{52}//;s/ .+//p ' ' /Launch[AD].+\.plist$/;END{if(NR<100)print "/System/";} ' '/\.xpc\/(Contents\/)?Info\.plist$/p' ' NR>1&&!/0x|\.[0-9]+$|com\.apple\.launchctl\.(Aqua|Background|System)$/ { print $3;} ' ' /\.(framew|lproj)|\):/d;/plist:|:.+(Mach|scrip)/s/:[^:]+//p ' '/root/p' ' !/\/Contents\/.+\/Contents|Applic|Autom|Frameworks/&&/Lib.+\/Info.plist$/;END{if(NR<100)print "/System/"};' '/^\/usr\/lib\/.+dylib$/p' '/\/etc\/(auto_m|hosts[^.]|peri)/s/^\.\/[^/]+//p' ' /\/(Contents\/.+\/Contents|Frameworks)\//d;p;' 's/\/(Contents\/)?Info.plist$//;p' ' { gsub("^| ","||kMDItem'${p[35]}'=");sub("^.."," ") };1 ' p '{print $3"\t"$1}' 's/\'$'\t''.+//p' 's/1/On/p' '/Prox.+: [^0]/p' '$2>'${p[9]}'{$2=$2-1;print}' ' BEGIN { i="'${p[26]}'";M1='${p[16]}';M2='${p[18]}';M3='${p[31]}';M4='${p[32]}';} !/^A/ { next;} /%/ { getline;if($5<M1) a="user "$2"%, system "$4"%";} /disk0/&&$4>M2 { b=$3" ops/s, "$4" blocks/s";} $2==i { if(c) { d=$3+$4+$5+$6;next;};if($4>M3||$6>M4) c=int($4/1024)" in, "int($6/1024)" out";} END { if(a) print "CPU: "a;if(b) print "I/O: "b;if(c) print "Net: "c" (KiB/s)";if(d) print "Net errors: "d" packets/s";} ' ' /r\[0\] /&&$NF!~/^1(0|72\.(1[6-9]|2[0-9]|3[0-1])|92\.168)\./ { print $NF;exit;} ' ' !/^T/ { printf "(static)";exit;} ' '/apsd|OpenD/!s/:.+//p' ' (/k:/&&$3!~/(255\.){3}0/ )||(/v6:/&&$2!~/A/ ) ' ' /lR/ { if($2<='${p[25]}')print $2;} ' ' BEGIN { FS=":";} $3~/(sh|ng|ic)$/ { n=split($3,a,".");sub(/_2[01].+/,"",$3);b=b"\n"$2" "$3" "a[n]" "$1;c=c$1;} END { d="sort|tail -n'${p[38]}'";print b|d;close(d);if(c)print("\n\t* Code injection");} ' ' NR!=4{next} {$NF/=10240} '"`S0 27 14`" ' END { if($3~/[0-9]/)print$3;} ' ' BEGIN { L='${p[36]}';} !/^[[:space:]]*(#.*)?$/ { l++;if(l<=L) f=f"\n "$0;} END { F=FILENAME;if(!F) exit;if(!f) f="\n [N/A]";"file -b "F|getline T;if(T!~/^(A.+ E.+ text$|POSIX sh.+ text ex)/) F=F" ("T")";printf("\nContents of %s\n%s\n",F,f);if(l>L) printf("\n ...and %s more line(s)\n",l-L);} ' ' BEGIN{FS="= "} /Path/{print $2} ' ' /^ +B/{ s/.+= |(-[0-9]+)?\.s.+//g;p;} ' ' END{print NR} ' ' /id: N|te: Y/{i++} END{print i} ' ' /:/{$0="'"${p[28]}"'"};1;' '/ en/!s/\.//p' ' NR!=13{next};{sub(/[+-M]$/,"",$NF)};'"`S0 39 40`" );c1=(system_profiler pmset\ -g nvram fdesetup find syslog df vm_stat sar ps sudo\ crontab sudo\ iotop top pkgutil PlistBuddy whoami cksum kextstat launchctl sudo\ launchctl crontab 'sudo defaults read' stat lsbom mdfind ' for i in ${p[24]};do ${c1[18]} ${c2[27]} $i;done;' defaults\ read scutil sudo\ dtrace sudo\ profiles sed\ -En awk /S*/*/P*/*/*/C*/*/airport networksetup mdutil );c2=(com.apple.loginwindow\ LoginHook '-c Print /L*/P*/loginw*' '-c Print L*/P*/*loginit*' '-c Print L*/Saf*/*/E*.plist' '~ $TMPDIR.. \( -flags +sappnd,schg,uappnd,uchg -o ! -user $UID -o ! -perm -600 \)' '.??* -path .Trash -prune -o -type d -name *.app -print -prune' '-c Print\ :'${p[35]}' 2>&1' '-c Print\ :Label 2>&1' '{/,}L*/{Con,Pref}* -type f ! -size 0 -name *.plist -exec plutil -s {} \;' "-f'%N: %l' Desktop L*/Keyc*" therm sysload boot-args status "-F '\$Time \$Message' -k Sender kernel -k Message Req 'Beac|caug|dead[^bl]|FAIL|GPU |hfs: Ru|inval|jnl:|last value [1-9]|n Cause: -|NVDA\(|pagin|proc: t|Roamed|rror|ssert|Thrott|tim(ed? ?|ing )o|WARN' -k Message Rne 'Goog|ksadm|SMC:' -o -k Sender fseventsd -k Message Req 'SL'" '-du -n DEV -n EDEV 1 10' 'acrx -o comm,ruid,%cpu' '-t1 10 1' '-f -pfc /var/db/*/*.{BS,Bas,Es,OSXU,Rem}*.bom' '{/,}L*/Lo*/Diag* -type f \( -exec grep -lq "^Thread c" {} \; -exec printf \* \; -o -true \) -execdir stat -f:%Sc:%N -t%F {} \;' '-L {/{S*/,},}L*/Lau* -type f' '-L /{S*/,}L*/StartupItems -type f -exec file {} +' '-L /S*/L*/{C*/Sec*A,E}* {/,}L*/{A*d,Compon,Ex,In,iTu,Keyb,Mail/B,P*P,Qu*T,Scripti,Sec,Servi,Spo}* -type f -name Info.plist' '/usr/lib -type f -name *.dylib' `awk "${s[31]}"<<<${p[23]}` "/e*/{auto_master,{cron,fs}tab,hosts,{launchd,sysctl}.conf} /usr/local/etc/periodic/*/* .launchd.conf" list getenv /Library/Preferences/com.apple.alf\ globalstate --proxy '-n get default' -I --dns -getdnsservers -getinfo\ "${p[N5]}" -P -m\ / '' -n1 '-R -l1 -n1 -o prt -stats command,uid,prt' '--regexp --only-files --files com.apple.pkg.*|sort|uniq' -kl -l -s\ / '-R -l1 -n1 -o mem -stats command,uid,mem' );N1=${#c2[@]};for j in {0..8};do c2[N1+j]=SP${p[j]}DataType;done;N2=${#c2[@]};for j in 0 1;do c2[N2+j]="-n ' syscall::'${p[33+j]}':return { @out[execname,uid]=sum(arg0) } tick-10sec { trunc(@out,1);exit(0);} '";done;l=(Restricted\ files Hidden\ apps 'Elapsed time (s)' POST Battery Safari\ extensions Bad\ plists 'High file counts' User Heat System\ load boot\ args FileVault Diagnostic\ reports Log 'Free space (MiB)' 'Swap (MiB)' Activity 'CPU per process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents launchd Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP RSSI Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory );N3=${#l[@]};for i in 0 1 2;do l[N3+i]=${p[5+i]};done;N4=${#l[@]};for j in 0 1;do l[N4+j]="Current ${p[29+j]}stream data";done;A0() { id -G|grep -qw 80;v[1]=$?;((v[1]==0))&&sudo true;v[2]=$?;v[3]=`date +%s`;clear;};for i in 0 1;do eval ' A'$((1+i))'() { v=` eval "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};A'$((3+i))'() { v=` while read i;do [[ "$i" ]]&&eval "${c1[$1]} ${c2[$2]}" \"$i\"|'${c1[30+i]}' "${s[$3]}";done<<<"${v[$4]}" `;[[ "$v" ]];};A'$((5+i))'() { v=` while read i;do '${c1[30+i]}' "${s[$1]}" "$i";done<<<"${v[$2]}" `;[[ "$v" ]];};';done;A7(){ v=$((`date +%s`-v[3]));};B2(){ v[$1]="$v";};for i in 0 1;do eval ' B'$i'() { v=;((v['$((i+1))']==0))||{ v=No;false;};};B'$((3+i))'() { v[$2]=`'${c1[30+i]}' "${s[$3]}"<<<"${v[$1]}"`;} ';done;B5(){ v[$1]="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d: <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F: ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`grep -Fv "${v[$1]}"<<<"$v"`;};C0(){ test "$v"&&echo "$_";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { v=`sed -E "$s"<<<"$v"`&&C1 1 $1;};for i in 1 2;do for j in 2 3;do eval D$i$j'(){ A'$i' $1 $2 $3; C'$j' $4;};';done;done;A0;{ A2 0 $((N1+1)) 2;C0;A1 0 $N1 1;C0;B0;C2 27;B0&&! B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D22 0 $((N1+4)) 5 4;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;A2 4 20 21;B7 6;B2 9;A4 14 7 52 9;B2 10;B6 9 10 4;C3 25;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;D23 24 24 32 31;D13 25 37 32 33;A1 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 48 42;D12 34 43 53 44;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;D22 32 31 43 38;D23 20 42 32 41;D23 14 2 48 43;D13 4 5 32 1;D22 4 4 50 0;D13 14 3 49 5;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
Copy the selected text to the Clipboard by pressing the key combination command-C.
7. Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
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Click anywhere in the Terminal window and paste by pressing command-V. The text you pasted should vanish immediately. If it doesn't, press the return key.
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exec bash
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At the top of the results, there will be a line that begins with "Model Identifier." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
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12. When you post the results, you might see the message, "You have included content in your post that is not permitted." It means that the forum software has misidentified something in the post as a violation of the rules. If that happens, please post the test results on Pastebin, then post a link here to the page you created.
Note: This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed. -
Hi,
Here is the standard MPLS network with vrf INTERNET:
PE2--P2--P1--PE1--INTERNET
|
CPE
PE1-routes
ip route vrf INTERNET 0.0.0.0 0.0.0.0 --> PE1
IP route vrf INTERNET 0.0.0.0 0.0.0.0 -- > INTERNET
vrf INTERNET 10.10.0.0/16 connected
192.168.0.5 is loopback for MP-BGP
PE2-routes
ip route vrf INTERNET 0.0.0.0 0.0.0.0 --> PE1
ip route vrf INTERNET 111.111.111.111 255.255.255.255 10.10.0.10
Route on PE2:
ip route vrf INTERNET 111.111.111.111 255.255.255.255 10.10.0.10 is misconfigured because nexthop is from network 10.10.0.0/16 which is directly is connected on PE1, and address 111.111.111.111 is not active
When I start the ping from CPE to 111.111.111.111 route on PE1 sends packet via P1, and P2 to PE2. PE2 has route that recursively points back to PE1. Ofcourse there is LOOP in routing network.
All devices except CPE are Cisco7600
Here are the questions:
1) With only one continuous PING packet-size 1500Bytes from CPE toward address 111.111.111.111 link utilisation P1-P2 goes up to 150Mbps. And with pings from more CPEs link utilisation rises. Why TTL doesn't prevent increasing of link utilisation?
2) CPU on PE2 goes up to 70-80%. Shouln't Cisco 7600 forward packets in hardware? Or maybe recursive lookup is done with CPU?
output from PE2:
Sh ip route vrf INTERNET 111.111.111.111
Routing entry for 111.111.111.111/32
Known via "static", distance 1, metric 0
Redistributing via bgp 65001
Advertised by bgp 65001
Routing Descriptor Blocks:
* 10.10.0.10
Route metric is 0, traffic share count is 1
PE2#sh ip route vrf INTERNET 10.10.0.10
Routing entry for 10.10.0.0/16
Known via "bgp 65001", distance 200, metric 0, type internal
Last update from 192.168.0.5 6d17h ago
Routing Descriptor Blocks:
* 192.168.0.5 (Default-IP-Routing-Table), from 192.168.0.5, 6d17h ago
Route metric is 0, traffic share count is 1
AS Hops 0
Regards,
Asorry, I made a mistake.
CPE is connected to PE1 like this:
PE2--P2--P1--PE1--INTERNET
|
CPE -
Hello all,
We have an MPLS setup with all remote sites connected to site X and site X is directly connected to site Y(datacenter). Note: site Y is not connected to MPLS cloud till now. All the traffic is passing from site X to site Y for accessing servers at datacenter. site X and site Y are connected to each other through Metro E. Now we have new circuit thats being provisioned for site Y(datacenter) that is going to be connected to MPLS cloud directly. We do bgp peering with ISP for MPLS connectivity and Internal routing protocol is Eigrp. We are doing mutual redistribution at each location for propogating routes at each site. Now the concern is when site Y is connected to MPLS and when I will do the route redistribution on site Y with MetroE connected to site X will there be a routing loop occurance or will there be a best path selection based on the metrics calculated and will choose the optimal path.
Need suggestions. Thanks in advance.Okay no problem, it can be a little daunting when you haven't done it before :-)
1) No this isn't right.
When I refer to remote sites I mean sites other than X or Y.
So you must not allow either X or Y to redistribute any remote site networks into BGP.
There is no need because the remote site networks should never be advertised from X or Y and if you do allow it it will cause you problems.
So assuming you want X and Y to back each other up -
X redistributes it's own subnets from EIGRP into BGP and also Y's but no remote sites.
Y redistributes it's own subnets from EIGRP into BGP and also X's but again no remote sites.
If X and Y were not connected via a dedicated link this would not be an issue but because they are and they are exchanging EIGRP routes via that link they each receive EIGRP routes for the remote sites networks from each other as well as from their own MPLS router which is why you need to filter.
2) You can do the configuration on your CE routers.
MED or AS prepending are the tools you use.
So at X you advertise it's own subnets without any modification. You advertise Y's subnets but change one of the above BGP attributes.
At Y you advertise it's own subnets without any modification and X's subnets you need to modify the BGP attribute again.
This basically means that traffic will go direct to X or Y as long as their MPLS links are up.
Either should work although it may be worth having a quick chat with your provider and tell them what you are doing to make sure they are not doing anything that would override your settings.
Apart from that internally the L3 switches in X and Y should see their own MPLS routers as the best path to all remote sites because from your description the L3 switch is only one hop away from the MPLS router in X and Y whereas to go via the dedicated link would mean more hops.
I'm assuming it means more hops.
Quick way to check is do a traceroute from X L3 switch to it's MPLS router and then a traceroute from X L3 switch to Y MPLS router and hopefully there should be more hops going to Y.
Do the same from the Y L3 switch.
If it is the same number of hops then you may have to modify the EIGRP metrics.
All of the above about redistribution only applies to EIGRP to BGP.
There is nothing to do about the BGP to EIGRP redistribution.
Concentrate on the redistribution issue because that could seriously affect your network in terms of it working properly.
Regarding the second issue have a chat with your provider about the MED and AS prepending just to clear it with them.
It's not a given that traffic would go in the wrong site, it might, but it wouldn't be the end of the world if you got it wrong temporarily because traffic is doing exactly that to and from the DC at the moment ie. it goes into X and across to Y.
By all means come back if you need more help but like I say focus on the redistribution issue because that really does need addressing.
Jon -
BGP Redistribute-internal and MPLS
Hi, usually when redistributing from BGP into IGP only EBGP routes are redistributed unless the bgp redistribute-internal command is configured which allows the redistribution of IBGP routes. However when doing the same redistribution on a PE router for a IGP running with the CE it seems that this command is not needed and IBGP routes still get redistributed into the IGP. It works without this command. Does anyone know why this is the case?
I have been trying to understand this for some time now and it seems very trivial however its been bugging me and was hoping someone could clarify. ThxHi Vikram,
Well, look at it this way, in the case of MPLS VPN, BGP between the PEs (address-family ipv4 vrf x) is used to transport the customer routes between CEs, and thus it is very logical that it should redistribute all kind of routes (in the case of MPLS VPN the customer routes are always going to be iBGP anyway since they are redistributed from IGP (PE-CE) on another PE - except on the local router when the customer is using BGP as the PE-CE routing protocol) - using another prospective, redistributing iBGP routes into IGPs may cause routing loops to form within an autonomous system, but in the case of PE-CE the redistribution is done into a routing protocol outside the BGP domain (customer side).
I hope that i've been informative.
BR,
Mohammed Mahmoud. -
I have issue Reditributing BGP into ISIS network. I have Router R1 running ISIS Level-2 with a neighborn router R2 ISIS L1-L2. Router R1 has a peering BGP with another router, so I want to redistribute network that receives from peering BGP and anounce to its neighbour ISIS.
Here are go setting, all seems to be ok, but withen I check into R2 network 172.16.40.0 it gets "% Subnet not in table"
R1 ISIS
R1#sh isis neighbors
R2 L2 Gi9/3 172.30.100.98 UP 24 R1.09
router isis
net 49.0001.0000.0000.0024.00
is-type level-2-only
redistribute connected
redistribute bgp 11562 route-map Metricas level-1-2
route-map Metricas permit 10
match ip address 20
access-list 20 permit 172.16.40.0 0.0.0.255
R1#show ip bgp neighbors 172.16.40.38 received-routes
Network Next Hop Metric LocPrf Weight Path
* i172.16.40.0/24 172.16.40.38 0 100 0 i
Command "redistribute bgp 11562 route-map Metricas level-1-2" I tried with "redistribute bgp 11562 route-map Metricas level-2" too, but didnt work. Please, help meThe prefix you're trying to redistribute into IS-IS is coming from an iBGP peering. By default, the BGP process will not redistribute iBGP into an IGP because this scenario can frequently create routing loops. If you really want to do this and you're sure your routing setup is stable, you can override this behaviour by adding the "bgp redistribute-internal" configuration command under your "router bgp" process.
Make sure you issue a "clear bgp ipv4 unicast *" to clear the BGP table once you've made the configuration change. -
Ebgp - full tables...how to redistribute (via IBGP) to RR's?
Hi,
We have a number of eBGP sessions with upstreams (receiving full tables+defaults) on 2 "edge" routers - Our number of PE routers has grown beyond 10, so we have introduced 2 x RR's in one DC, and established vpnv4+vpnv6 peering with them from all our other PE's(So all VRF prefixes are now "learnt/redistributed" via RR's than via the original full mesh).
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Is that the "standard/best practice" method?
Any guidance/suggestions are greatly appreciated.
Cheers.See
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Remote Development Services
If you use Macromedia Dreamweaver MX or Macromedia HomeSite+ to
develop your applications, you can access a remote ColdFusion MX 7
server using HTTP. However, you must configure Remote Development
Services (RDS) in your integrated development environment (IDE),
and RDS must be enabled in ColdFusion MX 7. Using RDS, IDE users
can securely access remote files and data sources, build SQL
queries from these data sources, and debug CFML code.
Note: The ColdFusion Report Builder uses RDS for the Query
Builder and for charting support.
However, for security reasons, Macromedia recommends that you
disable RDS on a production server. To disable it, you must disable
the RDSServlet mapping.
You actually configure your data sources through the
ColdFusion Administrator (and I guess through Dreamweaver too,
although I have never used it myself), but RDS lets you work with
them. Bottom line, if you allow your developer access to ColdFusion
via RDS, then they will have all of the privileges that are allowed
to the data source for the account that is configured in the
ColdFusion administrator for that database.
Phil -
A problem with Threads and loops.
Hi, I have some code that needs to be constantly running, like while(true)
//code here
}However, the code just checks to see if the user has input anything (and then if the user has, it goes to do some other stuff) so I don't need it constantly running and hogging up 98% of the CPU. So I made my class (which has the method that needs to be looped, call it ClassA) implement Runnable. Then I just added the method which needed to be looped into the public void run()
I have another class which creates an instance of the above class (call it ClassB), and the main(String[] args) is in there.
public static void main(String[] args)
ClassA test = new ClassA();
Thread thread = new Thread(test.getInstanceOfClassA());
thread.start();
while(true)
//I do not know what to put here
try
thread.sleep(100);
catch(InterruptedException iex)
}However, the thread only calls run() once,(duh...) but I can't think of away to get it to run - sleep - run -sleep forever. Can someone help me?Hi, I have some code that needs to be constantly
running, like while(true)
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input anything (and then if the user has, it goes to
do some other stuff) so I don't need it constantly
running and hogging up 98% of the CPU. Where does the user input come from. Are you reading from an InputStream? If so, then your loop will be blocked anyway when reading from the InputStream until data is available. During that time, the loop will not consume processor cycles.
public static void main(String[] args)
ClassA test = new ClassA();
Thread thread = new Thread(test.getInstanceOfClassA());I have never seen this idiom. If ClassA instanceof Runnable, you simply write new Thread(test).
thread.start();
while(true)
//I do not know what to put
do not know what to put here
try
thread.sleep(100);
catch(InterruptedException iex)
}However, the thread only calls run() once,(duh...)Yeah, why would you want to call it more than once given that you have an infinite loop in ClassA.run()?
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Help with if statement in cursor and for loop to get output
I have the following cursor and and want to use if else statement to get the output. The cursor is working fine. What i need help with is how to use and if else statement to only get the folderrsn that have not been updated in the last 30 days. If you look at the talbe below my select statement is showing folderrs 291631 was updated only 4 days ago and folderrsn 322160 was also updated 4 days ago.
I do not want these two to appear in my result set. So i need to use if else so that my result only shows all folderrsn that havenot been updated in the last 30 days.
Here is my cursor:
/*Cursor for Email procedure. It is working Shows userid and the string
You need to update these folders*/
DECLARE
a_user varchar2(200) := null;
v_assigneduser varchar2(20);
v_folderrsn varchar2(200);
v_emailaddress varchar2(60);
v_subject varchar2(200);
Cursor c IS
SELECT assigneduser, vu.emailaddress, f.folderrsn, trunc(f.indate) AS "IN DATE",
MAX (trunc(fpa.attemptdate)) AS "LAST UPDATE",
trunc(sysdate) - MAX (trunc(fpa.attemptdate)) AS "DAYS PAST"
--MAX (TRUNC (fpa.attemptdate)) - TRUNC (f.indate) AS "NUMBER OF DAYS"
FROM folder f, folderprocess fp, validuser vu, folderprocessattempt fpa
WHERE f.foldertype = 'HJ'
AND f.statuscode NOT IN (20, 40)
AND f.folderrsn = fp.folderrsn
AND fp.processrsn = fpa.processrsn
AND vu.userid = fp.assigneduser
AND vu.statuscode = 1
GROUP BY assigneduser, vu.emailaddress, f.folderrsn, f.indate
ORDER BY fp.assigneduser;
BEGIN
FOR c1 IN c LOOP
IF (c1.assigneduser = v_assigneduser) THEN
dbms_output.put_line(' ' || c1.folderrsn);
else
dbms_output.put(c1.assigneduser ||': ' || 'Overdue Folders:You need to update these folders: Folderrsn: '||c1.folderrsn);
END IF;
a_user := c1.assigneduser;
v_assigneduser := c1.assigneduser;
v_folderrsn := c1.folderrsn;
v_emailaddress := c1.emailaddress;
v_subject := 'Subject: Project for';
END LOOP;
END;
The reason I have included the folowing table is that I want you to see the output from the select statement. that way you can help me do the if statement in the above cursor so that the result will look like this:
emailaddress
Subject: 'Project for ' || V_email || 'not updated in the last 30 days'
v_folderrsn
v_folderrsn
etc
[email protected]......
Subject: 'Project for: ' Jim...'not updated in the last 30 days'
284087
292709
[email protected].....
Subject: 'Project for: ' Kim...'not updated in the last 30 days'
185083
190121
190132
190133
190159
190237
284109
286647
294631
322922
[email protected]....
Subject: 'Project for: Joe...'not updated in the last 30 days'
183332
183336
[email protected]......
Subject: 'Project for: Sam...'not updated in the last 30 days'
183876
183877
183879
183880
183881
183882
183883
183884
183886
183887
183888
This table is to shwo you the select statement output. I want to eliminnate the two days that that are less than 30 days since the last update in the last column.
Assigneduser....Email.........Folderrsn...........indate.............maxattemptdate...days past since last update
JIM......... jim@ aol.com.... 284087............. 9/28/2006.......10/5/2006...........690
JIM......... jim@ aol.com.... 292709............. 3/20/2007.......3/28/2007............516
KIM......... kim@ aol.com.... 185083............. 8/31/2004.......2/9/2006............. 928
KIM...........kim@ aol.com.... 190121............. 2/9/2006.........2/9/2006.............928
KIM...........kim@ aol.com.... 190132............. 2/9/2006.........2/9/2006.............928
KIM...........kim@ aol.com.... 190133............. 2/9/2006.........2/9/2006.............928
KIM...........kim@ aol.com.... 190159............. 2/13/2006.......2/14/2006............923
KIM...........kim@ aol.com.... 190237............. 2/23/2006.......2/23/2006............914
KIM...........kim@ aol.com.... 284109............. 9/28/2006.......9/28/2006............697
KIM...........kim@ aol.com.... 286647............. 11/7/2006.......12/5/2006............629
KIM...........kim@ aol.com.... 294631............. 4/2/2007.........3/4/2008.............174
KIM...........kim@ aol.com.... 322922............. 7/29/2008.......7/29/2008............27
JOE...........joe@ aol.com.... 183332............. 1/28/2004.......4/23/2004............1585
JOE...........joe@ aol.com.... 183336............. 1/28/2004.......3/9/2004.............1630
SAM...........sam@ aol.com....183876.............3/5/2004.........3/8/2004.............1631
SAM...........sam@ aol.com....183877.............3/5/2004.........3/8/2004.............1631
SAM...........sam@ aol.com....183879.............3/5/2004.........3/8/2004.............1631
SAM...........sam@ aol.com....183880.............3/5/2004.........3/8/2004.............1631
SAM...........sam@ aol.com....183881.............3/5/2004.........3/8/2004.............1631
SAM...........sam@ aol.com....183882.............3/5/2004.........3/8/2004.............1631
SAM...........sam@ aol.com....183883.............3/5/2004.........3/8/2004.............1631
SAM...........sam@ aol.com....183884.............3/5/2004.........3/8/2004............ 1631
SAM...........sam@ aol.com....183886.............3/5/2004.........3/8/2004............ 1631
SAM...........sam@ aol.com....183887.............3/5/2004.........3/8/2004............ 1631
SAM...........sam@ aol.com....183888.............3/5/2004.........3/8/2004............ 1631
PAT...........pat@ aol.com.....291630.............2/23/2007.......7/8/2008............ 48
PAT...........pat@ aol.com.....313990.............2/27/2008.......7/28/2008............28
NED...........ned@ aol.com.....190681.............4/4/2006........8/10/2006............746
NED...........ned@ aol.com......95467.............6/14/2006.......11/6/2006............658
NED...........ned@ aol.com......286688.............11/8/2006.......10/3/2007............327
NED...........ned@ aol.com.....291631.............2/23/2007.......8/21/2008............4
NED...........ned@ aol.com.....292111.............3/7/2007.........2/26/2008............181
NED...........ned@ aol.com.....292410.............3/15/2007.......7/22/2008............34
NED...........ned@ aol.com.....299410.............6/27/2007.......2/27/2008............180
NED...........ned@ aol.com.....303790.............9/19/2007.......9/19/2007............341
NED...........ned@ aol.com.....304268.............9/24/2007.......3/3/2008............ 175
NED...........ned@ aol.com.....308228.............12/6/2007.......12/6/2007............263
NED...........ned@ aol.com.....316689.............3/19/2008.......3/19/2008............159
NED...........ned@ aol.com.....316789.............3/20/2008.......3/20/2008............158
NED...........ned@ aol.com.....317528.............3/25/2008.......3/25/2008............153
NED...........ned@ aol.com.....321476.............6/4/2008.........6/17/2008............69
NED...........ned@ aol.com.....322160.............7/3/2008.........8/21/2008............4
MOE...........moe@ aol.com.....184169.............4/5/2004.......12/5/2006............629
[email protected]/27/2004.......3/8/2004............1631
How do I incorporate a if else statement in the above cursor so the two days less than 30 days since last update are not returned. I do not want to send email if the project have been updated within the last 30 days.
Edited by: user4653174 on Aug 25, 2008 2:40 PManalytical functions: http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96540/functions2a.htm#81409
CASE
http://download.oracle.com/docs/cd/B10501_01/appdev.920/a96624/02_funds.htm#36899
http://download.oracle.com/docs/cd/B10501_01/appdev.920/a96624/04_struc.htm#5997
Incorporating either of these into your query should assist you in returning the desired results. -
LOOP AT i_lfa1 INTO wa_lfa1 WHERE werks = space.
wf_tabix = sy-tabix.
APPEND wa_lfa1 TO i_lfa1_werks.
DELETE i_lfa1 index wf_tabix.
ENDLOOP.
in the above code the sy-tabix is always 2.
what i want to know is if there is a where clause , should we not use the sy-tabix for deletion.>
Keshav.T wrote:
> May be ill get something from sap help.
Hello Keshav,
As a matter of fact , I always do
SAP says:
If you delete the current line or lines in front of the current line, the internal loop counter is decreased by one with each deleted line. In the case of loops on index tables or if using a sorted key, this affects sy-tabix in the subsequent loop pass, and sy-tabix is decreased accordingly
@Dzed: Hail SAP Help !!! Anyways this was common sense & i dont think SAP processor is dumb
Cheers,
Suhas
Edited by: Suhas Saha on Jan 28, 2010 6:46 PM
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