有线portal认证无法重定向到认证页面

有线做了portal认证，打开浏览器浏览网也时没有自动跳转到portal认证页面，无法重定向。但是直接在浏览器上输入portal网址可以跳转到认证页面。

配置如下
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radius scheme allpermit

 primary authentication 192.168.254.7

 primary accounting 192.168.254.7

 key authentication cipher $c$3$6qu793p7fPbYvm/oCkPv0funFSCiuRhT

 key accounting cipher $c$3$Q0P6Oq7P94h1txBXCiJ3n8KpF0/ofKlm

 nas-ip 192.168.100.254

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domain wh

 authentication portal radius-scheme allpermit

 authorization portal radius-scheme allpermit

 accounting portal radius-scheme allpermit

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portal server myportal

 ip 192.168.100.254 key cipher $c$3$KwbeFUCCSuavJatEk79ZTv/cqJ6W0Q2Dyw==

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portal web-server myportal

 url http://192.168.254.7:8080/portal

 url-parameter nasip value 192.168.100.254

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interface Vlan-interface10

 ip address 192.168.10.254 255.255.254.0

 portal enable method direct

 portal domain wh

 portal bas-ip 192.168.10.254

 portal apply web-server myportal

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