<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Hi Susanne, <div><br></div><div><div><br><blockquote type="cite"><div>On May 27, 2024, at 09:59, Susanne Will <will.susanne@net-24.at> wrote:</div><br class="Apple-interchange-newline"><div><span style="font-family:arial,helvetica,sans-serif; font-size:12px"></span><span style="font-family:arial; font-size:small"><span style="font-family:arial,helvetica,sans-serif; font-size:12px">Hi,<br><br>sorry for my late answer. I was very busy last days. Yes, i configured non-broadcast because i don't want to have multicast inside my wireguard links. Is it possibble to have bouth, fast hello intervall and non-broadcast?<br></span></span></div></blockquote><div><br></div><div>Yes - you can specify the hold interval to be 1 second (or any other value) on the neighbor command in “router ospf” mode. </div><div><br></div><div>I’m assuming you are explicitly configuring neighbors since you don’t have multicast to dynamically discover them. </div><div> </div><div><dt class="sig sig-object std" id="clicmd-neighbor-A.B.C.D-poll-interval-1-65535-priority-0-255" style="box-sizing: border-box; font-weight: 600; margin: 0px 0px 6px; font-family: "Fira Mono"; background: rgb(231, 242, 250); color: rgb(41, 128, 185); border-top-width: 3px; border-top-style: solid; border-top-color: rgb(106, 176, 222); display: table; font-size: 14.4px; line-height: normal; padding: 6px; position: relative; font-variant-ligatures: normal; orphans: 2; widows: 2; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span class="sig-name descname" style="box-sizing: border-box; font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", Courier, monospace; color: rgb(0, 0, 0);"><span class="pre" style="box-sizing: border-box;">neighbor</span> <span class="pre" style="box-sizing: border-box;">A.B.C.D</span> <span class="pre" style="box-sizing: border-box;">[poll-interval</span> <span class="pre" style="box-sizing: border-box;">(1-65535)]</span> <span class="pre" style="box-sizing: border-box;">[priority</span> <span class="pre" style="box-sizing: border-box;">(0-255)]</span></span><a class="headerlink" href="https://docs.frrouting.org/en/latest/ospfd.html#clicmd-neighbor-A.B.C.D-poll-interval-1-65535-priority-0-255" title="Link to this definition" style="box-sizing: border-box; color: rgb(64, 64, 64); text-decoration: none; cursor: pointer; display: inline-block; font-weight: normal; font-stretch: normal; font-size: 14.4px; line-height: 1; font-family: FontAwesome; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal; text-rendering: auto; -webkit-font-smoothing: antialiased; opacity: 0; margin-left: 0.5em;"></a></dt><dd style="font-size: 16px; box-sizing: border-box; margin: 0px 0px 12px 24px; line-height: 24px; color: rgb(64, 64, 64); font-family: "Fira Sans", Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(252, 252, 252); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><p style="box-sizing: border-box; line-height: 24px; margin: 0px;">Configures OSPF neighbors for non-broadcast multi-access (NBMA) networks and point-to-multipoint non-broadcast networks. The <cite style="box-sizing: border-box;">poll-interval</cite> specifies the rate for sending hello packets to neighbors that are not active. When the configured neighbor is discovered, hello packets will be sent at the rate of the hello-interval. The default <cite style="box-sizing: border-box;">poll-interval</cite> is 60 seconds. The <cite style="box-sizing: border-box;">priority</cite> is used to for the Designated Router (DR) election on non-broadcast multi-access networks.</p><p style="box-sizing: border-box; line-height: 24px; margin: 0px;"><br></p></dd></div><div><br></div>Hope this helps,</div><div>Acee</div><div><br></div><div><blockquote type="cite"><div><span style="font-family:arial; font-size:small"><span style="font-family:arial,helvetica,sans-serif; font-size:12px"><br>Here are the requestet outputs of ip ospf interface and tcpdump. </span><br><br>output of "show ip ospf interface" when connection is up<br><br>wg1 is up<br> ifindex 9, MTU 1420 bytes, BW 0 Mbit <UP,POINTOPOINT,RUNNING,NOARP><br> Internet Address 10.36.101.1/30, Broadcast 10.36.101.3, Area 0.0.0.0<br> MTU mismatch detection: enabled<br> Router ID 10.36.5.1, Network Type NBMA, Cost: 10<br> Transmit Delay is 1 sec, State Backup, Priority 1<br> Designated Router (ID) 10.36.100.1 Interface Address 10.36.101.2/30<br> Backup Designated Router (ID) 10.36.5.1, Interface Address 10.36.101.1<br> Saved Network-LSA sequence number 0x80000005<br> Multicast group memberships: OSPFAllRouters<br> Timer intervals configured, Hello 1s, Dead 5s, Wait 5s, Retransmit 5<br> Hello due in 0.012s<br> Neighbor Count is 1, Adjacent neighbor count is 1<br>============================================================================================<br><br><br>output of "show ip ospf interface" when connection is down<br><br>wg1 is up<br> ifindex 9, MTU 1420 bytes, BW 0 Mbit <UP,POINTOPOINT,RUNNING,NOARP><br> Internet Address 10.36.101.1/30, Broadcast 10.36.101.3, Area 0.0.0.0<br> MTU mismatch detection: enabled<br> Router ID 10.36.5.1, Network Type NBMA, Cost: 10<br> Transmit Delay is 1 sec, State DR, Priority 1<br> Designated Router (ID) 10.36.5.1 Interface Address 10.36.101.1/30<br> No backup designated router on this network<br> Saved Network-LSA sequence number 0x80000006<br> Multicast group memberships: OSPFAllRouters<br> Timer intervals configured, Hello 1s, Dead 5s, Wait 5s, Retransmit 5<br> Hello due in 0.327s<br> Neighbor Count is 0, Adjacent neighbor count is 0<br>===================================================================================<br><br>output of tcpdump when connection is up:<br><br>11:31:11.804925 IP (tos 0xc0, ttl 1, id 56965, offset 0, flags [none], proto OSPF (89), length 68)<br> 10.36.101.2 > 10.36.101.1: OSPFv2, Hello, length 48<br> Router-ID 10.36.100.1, Backbone Area, Authentication Type: none (0)<br> Options [External]<br> Hello Timer 1s, Dead Timer 5s, Mask 255.255.255.252, Priority 1<br> Designated Router 10.36.101.2, Backup Designated Router 10.36.101.1<br> Neighbor List:<br> 10.36.5.1<br>11:31:11.950761 IP (tos 0xc0, ttl 1, id 28025, offset 0, flags [none], proto OSPF (89), length 68)<br> 10.36.101.1 > 10.36.101.2: OSPFv2, Hello, length 48<br> Router-ID 10.36.5.1, Backbone Area, Authentication Type: none (0)<br> Options [External]<br> Hello Timer 1s, Dead Timer 5s, Mask 255.255.255.252, Priority 1<br> Designated Router 10.36.101.2, Backup Designated Router 10.36.101.1<br> Neighbor List:<br> 10.36.100.1<br>11:31:12.805336 IP (tos 0xc0, ttl 1, id 56968, offset 0, flags [none], proto OSPF (89), length 68)<br> 10.36.101.2 > 10.36.101.1: OSPFv2, Hello, length 48<br> Router-ID 10.36.100.1, Backbone Area, Authentication Type: none (0)<br> Options [External]<br> Hello Timer 1s, Dead Timer 5s, Mask 255.255.255.252, Priority 1<br> Designated Router 10.36.101.2, Backup Designated Router 10.36.101.1<br> Neighbor List:<br> 10.36.5.1<br>11:31:12.951058 IP (tos 0xc0, ttl 1, id 28026, offset 0, flags [none], proto OSPF (89), length 68)<br> 10.36.101.1 > 10.36.101.2: OSPFv2, Hello, length 48<br> Router-ID 10.36.5.1, Backbone Area, Authentication Type: none (0)<br> Options [External]<br> Hello Timer 1s, Dead Timer 5s, Mask 255.255.255.252, Priority 1<br> Designated Router 10.36.101.2, Backup Designated Router 10.36.101.1<br> Neighbor List:<br> 10.36.100.1<br>=======================================================================================<br><br>output of tcpdump when connection is down:<br><br>11:27:18.746172 IP (tos 0xc0, ttl 1, id 27984, offset 0, flags [none], proto OSPF (89), length 64)<br> 10.36.101.1 > 10.36.101.2: OSPFv2, Hello, length 44<br> Router-ID 10.36.5.1, Backbone Area, Authentication Type: none (0)<br> Options [External]<br> Hello Timer 1s, Dead Timer 5s, Mask 255.255.255.252, Priority 1<br> Designated Router 10.36.101.1<br>11:28:18.746556 IP (tos 0xc0, ttl 1, id 27985, offset 0, flags [none], proto OSPF (89), length 64)<br> 10.36.101.1 > 10.36.101.2: OSPFv2, Hello, length 44<br> Router-ID 10.36.5.1, Backbone Area, Authentication Type: none (0)<br> Options [External]<br> Hello Timer 1s, Dead Timer 5s, Mask 255.255.255.252, Priority 1<br> Designated Router 10.36.101.1<br>11:29:18.747514 IP (tos 0xc0, ttl 1, id 27986, offset 0, flags [none], proto OSPF (89), length 64)<br> 10.36.101.1 > 10.36.101.2: OSPFv2, Hello, length 44<br> Router-ID 10.36.5.1, Backbone Area, Authentication Type: none (0)<br> Options [External]<br> Hello Timer 1s, Dead Timer 5s, Mask 255.255.255.252, Priority 1<br> Designated Router 10.36.101.1</span><br><br><br>
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