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Task #7180

Updated by ll nu over 4 years ago

* router1-new is up and running 

 h2. Steps 

 * Verify / update cdist configuration 
 * Checkout IP configuration 
 ** Add VRRP IPs to loopback interface (will be used instead of keepalived) 
 * Verify sysctl configuration 
 * Rerun cdist, exclude announcing of routes 
 * Adjust radvd configuration 
 ** lower interval 
 ** lower life time 


 h2. cdist configuration 

 Was written for Devuan/keepalived. Need to check step-by-step. 

 * __ungleich_bgp_router: *TEMPFIX* 
 ** contains static route announcements 
 ** can only be used once the upstream networking is verified 
 * __dcl_node_exporter: still makes sense 
 ** Is debian/devuan specific, needs changes 
 * __ungleich_ipv6_radvd --config router-$dc 
 ** 80% done 
 ** restart needs to be implemented 
 *           __ungleich_nftables     --config router-$dc 
 * --__dcl_router_resolvconf --search-path "$d"--: done 
 ** no changes required       
 * __dcl_tftp_http_pxe_bootserver 
 ** ok, needs to be tested for alpine 
 ** needs to be updated for ipv6 only boot 
 ** could be moved to APUs 
 * -require="__dcl_router_network" __dcl_router_keepalived --master-: done 
 ** Needs to be ported to loopback + bgp 
 ** -commented out statement for place6 routers-: done 
 * __dcl_router_network --ipsuffix 5 
 ** Need to add keepalived IPs 
 * #           __dcl_nat64 --mtu 9000 


 h2. Networking 

 * Update interfaces for alpine 
 ** -place6- 
 ** place5  

 h2. Implementing virtual IPs with BGP 

 * Announce the IPv6/128 IPv4/32 address 
 ** Or network alone is enough? 
 * -Add the addresses to the loopback interface-: done 
 ** all done locally on router1-new 
 ** Needs to be put back into cdist 
 * Add addresses for place5 

 h2. Firewalling 

 h2. Change router advertisements 

 We will have 2 active routers now with both advertising with radvd at the same time. 
 This is part of replacing keepalived. 

 * -Change router advertisement lifetime to 10 seconds- 
 * -Change advertisement interval to 3..5- 
 * Modify cdist type to restart/reload radvd on changes 


 <pre> 
   MinRtrAdvInterval 3; 
   MaxRtrAdvInterval 5; 
   AdvDefaultLifetime 10; 
 </pre> 

 * Good documentation: https://packetlife.net/blog/2011/apr/18/ipv6-neighbor-discovery-high-availability/ 

 h2. IPv4 NAT session table 

 * With two active routers, the masquarading session information is only stored on one router 
 * If reply is received by other router, no session table match is found 
 * This only effects client devices 
 ** VMs are using direct public IPv4 


 h2. Switch configuration 

 * Switches *might* need ipv4 bgp peering for providing virtual IPv4 address support 
 * Don't see traffic on router1-new from upstream 
 ** Need to verify trunk configuration on switches 

 <pre> 
 switch5-place6(config)#vlan 100 
 switch5-place6(config-vlan-100)#name netstream 
 switch5-place6(config-vlan-100)#write  
 Copy completed successfully. 

 switch6-place6#configure  
 switch6-place6(config)#vlan 100 
 switch6-place6(config-vlan-100)#name netstream 
 switch6-place6(config-vlan-100)#write  
 Copy completed successfully. 

 </pre> 


 h2. Building jool 


 Requirements: 

 <pre> 
 apk upgrade 
 apk add alpine-sdk 
 apk add libnl3-dev 
 apk add iptables-dev 
 apk add linux-vanilla-dev 
 apk add argp-standalone 
 reboot 
 </pre> 

 Build: 

 <pre> 
 wget https://github.com/NICMx/Jool/releases/download/v4.0.1/jool_4.0.1.tar.gz 
 tar xvfz jool_4.0.1.tar.gz 
 cd jool-4.0.1/ 
 ./configure && make && make install 
 </pre> 


 h2. Missing routes from iBGP 

 * new router1.place6 does not receive full routing table from peers in place5 
 * Error "Invalid NEXT_HOP attribute" appears in the config file 
 ** Good documentation: 
 *** https://blog.cybozu.io/entry/bird (use translate...) 
 ** It seems bird1.6 uses the peer's ip address for the route while 
 ** bird2 uses the "correct" next hop address inside the route 
 * Solution for bird2: "next hop self ebgp;"

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